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Chemistry 2023 WAEC Past Questions

The vapour density of an organic compound with the molecular formula \(C_2H_4O_2\), is [H=1.0, C=12.0, O= 16.0]

The following statements are correct except

• A. energy is released when liquids change to solids.
• B. carbon atoms in gaseous methane are further apart than those in solid diamond.
• C. there is large decrease in the volume of a solid metal when pressure is applied to it.
• D. particles move faster in the gaseous state than in the liquid state.

Which of the following reactions represents the hydrolysis of an alkanoate?

• A. \(CH_3COOH + OH^- ⇌H^+⇌ CH_3COO^- + H_2O\)
• B. \(CH_3COOH + C_2H_5OH ⇌H^+⇌ CH_3COOC_2H_5 + H_2O\)
• C. \(CH_3COOC_2H_5 + H_2O ⇌H^+⇌ CH_3COO^- + CH_3CH_2OH\)
• D. \(CH_3COOCH_2CH_3 + H_2O ⇌H^+⇌ CH_3COOH + CH_3CH_2OH\)

The following steps are scientific methods except

• A. experimentation
• B. problem identification
• C. Analysis
• D. Open-mindedness

Alkenes can be manufactured by

• A. the combustion of alkanes.
• B. the cracking of hydrocarbons.
• C. polymerization reactions.
• D. addition of hydrogen to unsaturated vegetable oils.
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Home » EXAM NEWS » WAEC Chemistry Objective And Theory Answers 2023/2024

WAEC Chemistry Objective And Theory Answers 2023/2024

Waec Chemistry Questions and Answers for free to all Weac candidates In Ghana, Liberia, Nigeria, Sierra Leone, and The Gambia. On this page, all the Waec Chemistry questions and answers for 2023 and the most common questions and answers are released here.

Waec Candidates that applied for the West African Examination Council (WAEC) SSCE Examination will write their Waec Chemistry For Science students. All details you need for you to be successful and pass this 2023 Waec Exam will also be given and make sure you read all through.

2023 Waec Chemistry Exam Papers

2023 Waec Chemistry Exam Papers Are

• Waec Chemistry Essay Questions
• Waec Chemistry Objectives Questions,

You are writing the 2 papers in only one day. In this post, the previous Year’s Waec questions and answers for Chemistry are released and the 2023 Waec Chemistry Exam Questions will also be released for those participating in the 2023 Waec examination.

2023 Waec Chemistry Questions and Answers Objective (paper 1)

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Previous Year WAEC Chemistry OBJ ANSWERS

CHEM-OBJ 1caacabcdbc 11babaadbdca 21bccaabcdcb 31abcbcccbbc 41abdbbbaabb Chem-Theory-Answers

==================================

2023 Waec Chemistry Questions and Answers THEORY (paper 2)

The  2023 Waec Chemistry Theory questions and answers are loading!  2023 Chemistry Essay answers Loading!! 2023 Waec Chemistry Theory Answers Loading!!! Kindly bookmark the website for the answers that will be released. or better still reload the site to check if the answers for the 2023 Waec Chemistry questions and answers have dropped.

3d) VIEW IMAGE HERE – CLICK

3ai) structural isomerism is the existence of two or more compounds ( known as isomers) with the same molecular formula but different molecular structures

3ai) i) tertiary alkanol ii) secondary alkanol iii) primary alkanol

3bi) i) 2[CH3 CH2 COOH ] 2K(s)—-> ii) [CH3 CH2 COO ] K + H2 i) 2[CH3 CH2 COOH ] +2 K(s) ——> 2[ CH3 CH2 COO ] K + H2

ii) CH3 CH2 COOH + C4 H9OH HEAT—->CH3 CH2 COO C4 H9 + H20 H2SO4

iii)CH3 CH2 CH2 CH20H + H^+ KMnO4——> CH3 CH2 CH2 CH2 – 0H EXCESS

3bii) i) potassium ethanoate,hydrogen ii) butyl propanoate and water iii) enthanal

3c) The percentage composition of the hydrocarbon = 100 H + C = 100 14.3 + C =100 C= 100 – 14.3 C= 85.7% ================

1a) nucleons is the collective name for two important sub-atomic particles:neutrons and protons

1b) Graham’s law of diffusion states that at a constant temperature and presure,the rate of diffusion of a gas is inversely proportional to the square root of it density

1c) because when aluminum is exposed to moist air,a thin continuous coating of aluminum oxide is formed, which prevents futher attack of the aluminium by atmospheric oxygen and water or steam under normal conditions

1d) i) electron – affinity ii) electron – negativity iii) ionization – energy

1e) i) the molecule of real gases occupies space and there are forces of the attraction between them ii) real gases do liquefy when their temperature droops.

1f) i)used in seperation of different component of crude oil. ii)it is used for separating acetonic from water iii) it is used for obtaining different gases from air for industrial use.

1g) i)concentration of ions in electrolyte ii)the nature of the electrode iii)the position of ions in the electrochemical series

1h) i)substitution reaction ii)addition reaction

1i) i)carbon dioxide ii)water vapour iii) carbon monoxide

1j) i)centrifugation ii)sieving iii)evaporation to dryness ==================================

2a) i) isotopy ii) they have the same number of proton (atomic number) but different mass number iii) oxygen,carbon iv)1s^2,2s^2,2p^6,3s^2,3p^5

2bi) PHYSICAL PROPERTIES METAL i) high melting and boiling point ii) they are good conductor of heat and electricity

NON-MATEL i)they have lower melting and boiling point ii)they are poor conductors of heat and electricity.

CHEMICAL PROPERTIES METAL i) they form basic and ampheric oxides ii)the react by electron lose or donation of electron NON-METAL i)the form acidic oxides ii)the react by sharing and accepting electrons

2bii) i) Al2 O3(Aluminum oxide) ii) sodium hydride (NaH) iii)zinc trioxocarbonate(iv)ZnCo3 iv)silicon tetrachloride (SiCl4)

2ci) i) variable oxidation states ii) complex ion formation iii) they possess strong metallic bonding

2cii) 1s^2,2s^2, 2p^6, 3s^2, 3p^6, 3d^10, 4s^2

2ciii) Zinc is not considered as a typical transition element bacause it has only one oxidation state of +2, it metallic ion are not coloured and it is not used as a catalyst.

2d) Na2Co3 + MgCl2 —->2NaCl + MgCo3 1mole 1mole 2mole 1mole molar mass of Na2 Co3 = 2 * 23 + 12 * 1 + 16 * 3 = 46+12+48 = 106g ==================================

5ai) Na2S2O3 ===>2 + 2x + 6 = 0 2x = 6 – 2 = 4 X = 4/2 X = 2 The oxidation number of sulphur is 2

5aii) Rhombic&monoclinic

5aiii) – Both are tetravalent – both are allotrope of carbon

5bi) CO2&Chloroflorocarbon

5bii) There is increase in sun radiation reaching the earths surface ie Global warming

5biii) ThunderStorm

5iv) I2KNo3. ——–>2KNO3 + O2 2AgNo3 ———>. 2Ag + 2No

5ci) Calcium chloride in a solution can give rise to crystal using filtration and evaporation to dryness. The sol is filtered into filtrate and residue b4 evaporation to dryness takes place.

5cii) – Because of presence of hydrogen bonding in NH3 – Because Iodine as higher molecular mass than chlorine

5di) Mol of Nacl = Mass / MM = 5.85/ 58.01 = 0.1mol From the equation 2mol of Nacl gives 2mol of HCL, 0.1mol of Nacl gives 0.1mol of Hcl Vol of Hcl = 0.1 x 22.4 = 2.24mol/dm^3 ================

Practice Waec Chemistry Questions On Objective

If you can be able to access these questions with the appropriate answers without using textbooks or materials you are 80% ready for the 2023 Chemistry Exam. Kindly submit the answer in the comment section below and if you are interested in the 2023 Waec Chemistry answers kindly show interest.

The components of universal indicator solution can best be separated by

A. Chromatography B. Filtration C. Evaporation D. Crystallization E. Fractional distillation

The number of replaceable hydrogen atoms in one acid indicates its

A. Basicity B. Acidity C. Alkalinity D. Reactivity E. PH value

Catalytic hydrogenation of alkenes produces compounds with the general formula

A. CnH2n+1 OH B. CnH2n+1 C. CnH2n+2 D. CnH2n-2 E. Cx(H2O)y

A measure of the degree of disorder in a chemical system is known as the

A. Enthalpy B. Free energy C. Activation energy D. Entrophy E. Equilibrium

Which of the following occurs when an aqueous solution of sodium hydroxide is electrolysed using graphite electrodes?

A. Sodium metal is produced at the anode B. Sodium amalgam is formed at the cathode C. Oxygen gas is produced at the anode D. The grahite anode dissolves E. The resulting solution becomes acidic

If the volume of a given mass of gas at 0oC is 27.3cm3, what will be the volume of the gas at 10oC, pressure remaining constant?

A. 2.73cm3 B. 28.3cm3 C. 37.3cm3 D. 273cm3 E. 283cm3

Glucose can be obtained from starch by

A. Hydrogenation B. Dissoiation C. Hydrolysis D. Dialysis E. Dehydration

How many faradays of electricity are required to liberate 9g aluminium? (AI = 27)

A. 0.1 B. 0.3 C. 1.0 D. 2.7 E. 3.0

When water is dropped on calcium carbide, the gaseous product is an

A. Alkane B. Alkene C. Alkyne D. Alkanol E. Alkanal

Practice Waec Chemistry Questions On Theory

a) Define each of the following terms and indicate one use of each: (i) Nuclear fission; (ii) Nuclear fusion. (b) Alpha particle emission by 29325� proceduces an element A. Beta particle emission by the particle A produces another element B. Element B also undergoes alpha particle emission to produce 22789��. Write balanced equations to represent the above statement. (c) The models below represent the filling of orbitals in an atom.

State which rule(s) is/are violated or obeyed by each model. (d) Explain why the boiling point of H2S with relative molecular mass of 34 is lower than that of H2O with relative molecular mass of 18.

(e) HCI is passed into each of the following solvents: (i) water; (ii) methylbenzene. I. State the effect of each solution on blue litmus paper II. Compare the electrical conductivities of the two solutions.

(f) Zinc dust is added to copper (II) tetraoxosulphate (VI) solution. State; (i) what is observed; (ii) the type of reaction that occurs.

Question 2 :

(a)(i) State two differences betwecii the properties of solids and gases (ii) What process does each of X, Y and Z represent in the changes shown below?

Waec Chemistry Question and Answers

(b)(i) State Charles’ Law (ii) Draw a sketch to graphically illustrate Charles’ Law.

(d)(i) State two assumptions X of the kinetic theory. (ii) Consider the reaction represented by the Solid or Liquid following equation: H2(�) + Cl2(�) → 2HCI(�) Use the kinetic theory to explain how the rate of formation of HCI(�) would be affected by I. increase in temperature; II. decrease in pressure.

(e) Given different examples, mention one metal in each case that produces hydrogen on reacting with (i) dilute mineral acid; (ii) cold water; (iii) steam; (iv) hot, concentrated alkali.

The  2023 Waec Chemistry Theory and objective questions and answers are loading!  2023 Chemistry Essay answers Loading!! 2023 Waec Chemistry objective Answers Loading!!! Kindly bookmark the website for the answers that will be released. or better still reload the site to check if the answers for the 2023 Waec Chemistry questions and answers have dropped.

Before you leave this page kindly make sure you understand and know how WASSCE grades your WAEC Subject. The reason why we are doing this, is not to frighten or scare you but to put you in check and see reasons why you need to be serious with your Government study for the 2023 Government Exam

Waec Grading System For all Waec Candidates

Do you know that the West African Examination Council (WAEC) Board has published the Waec grading system of results? Kindly check below to see the meaning of the  Waec Grading Result .

The table below shows candidates’ positioning of the Waec grading of results ranging from A1, B2, B3, C4, C5, C6, D7, E8, F9 are the complete list of Waec Grading Result. All Waec candidates must fall into one of the Waec Grading Systems.

WAEC Gradi n g Percentage Scores

• A1 Excellent 75% – 100%
• B2 Very good 70% – 74%
• B3 Good 65%  –  69%
• C4 Credit 60% – 64%
• C5 Credit 55% – 59%
• C6 Credit 50% – 54%
• D7 Pass 45% – 49%
• E8 Pass 40% – 45%
• F9 Failure 0% – 44%

If you have been wondering where to get the best and latest Waec news updates and guide about Waec 2023, how to pass Waec, a timetable for 2022/2023 Waec, free online and hardcopy Waec past questions, and hot topics to read for Waec, latest news updates and Waec CBT practice platform, then  subscribe to the newsletter  or join our Forum

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Genuine Exam Past Questions and Answers Online Bookshop – PDF and MS Word Download

WAEC Chemistry Past Questions and Answers in 2023 PDF Download Objective & Theory

Are you writing the West Africa Examination Council WAEC Internal or External examination, if yes you need the WAEC Past Questions on Chemistry

we at stcharlesedu.com has compiled a good number of Chemistry WAEC Past Questions and Answers in Pdf Chemistry 2 – Theory/Essay Questions. Chemistry 1 – Objective Test Questions.

Our research has confirm that candidate that uses WASSCE Chemistry past questions to prepare is ten times better than those who do not.

Table of Contents

• 1.1 Chemistry WAEC Objective Questions
• 2 SSCE WAEC Chemistry Theory Questions
• 3 Chemistry WAEC Essay Questions
• 4 Free WAEC Chemistry Exam Past Questions Download
• 5 How to Get WASSCE Chemistry Exam Past Questions and Answers

SSCE WAEC Chemistry Objective Questions and Answers

CHEMISTRY Paper 1 (Objective Test Questions) Paper 1 will last for 1 hours Use HB pencil throughout.

Answer All Questions Each question is followed by four options lettered A to D. Find out the correct options for each question and shade in pencil on your answer sheet, the answer space which bears the same letter as the option you Chosen. Give only one answer to each question. An example is given below

What others are downloading   WAEC Past Questions for all Subjects

Chemistry WAEC Objective Questions

Which of the following elements reacts with water? A. Carbon B. Iodine C. Sodium D. Sulphur

The correct answer is Sodium, which is lettered C and therefore answer space C would be shaded. [A] [ B ] [C] [ D ]

Think carefully before you shade the answer spaces; erase completely any answer you wish to change.

Which of the following raw materials is used in the plastic industry? A. Ethene B. Methane C. Sulphur D. Hydrogen

Which of the following organic compounds can undergo both addition and substitution reactions? A. Petane B. Benzene C. Propane D. Hexane

Which of the following equations represents a redox reaction? A. AgNO 3 (aq) + KCl(ag)->AgCl(s)+ KNO 3 (aq) B. HNO 3 (aq)+ NaOH(aq) -> NaNO 3 (aq) + H 2 O(l) C. CaCO 3 (s) -> CaO(s) + CO 2 (g) D. 2H 2 S(g) + SO 2 (g) -> 2H 2 O(I) + 3S(g)

T he process of extraction of iron from its ore is A. decomposition. B. oxidation. C. reduction. D. sublimation.

What is the solubility of a salt if 0.4 g of it is obtained on evaporating 200 cm3 of its saturated solution to dryness? A. 0.08 gdm -3 B. 2.00 gdm -3 C. 8.00 gdm -3 D. 80.00 gdm -3

An acidic salt has A. double anions in its aqueous solution. B. a single cation in its aqueous solution. C. hydrogen ions in its aqueous solution. D. hydrogen atoms in its aqueous solution.

A reaction is endothermic if the A. reaction vessel feels cool during the reaction. B. enthalpy change is negative. C. bond forming energy exceeds bond breaking energy. D. heat of formation of reactants exceeds heat of formation of products.

In which of the following compounds does hydrogen form ionic compounds? A. CH 4 B. HCl C. NH 3 D. NaH

Consider the following reaction equation: Br 2 + 2KI -> 2KBr + I 2 . Bromine is acting as A. an oxidizing agent. B. a reducing agent. C. an acid. D. a base.

An organic compound has the empirical formula CH 2 . If its molar mass is 42 gmol-1 what is its molecular formula? [H = 1.0, C = 12.0] A. C 2 H 4 B. C 3 H 4 C. C 3 H 6 D. C 4 H 8

Ethene is produced from ethanol by A. decomposition. B. hydrolysis. C. ozonolysis. D. dehydration.

Consider the following equilibrium reaction: 2 AB(g) + B 2 (g) -><- 2AB 3 (g) AH = -XkJmol -1 The backward reaction will be favored by A. a decrease in pressure. B. an increase in pressure. C. a decrease in temperature. D. an introduction of a positive catalyst.

What is the mass of solute in 500 cm 3 of 0.005 moldm -3 H 2 SO 4 ? [H =1.0, O = 16.0, S = 32.0] A. 0.490 g B. 0.049 g C. 0.245 g D. 0.0245 g

Pure water can be made to boil at a temperature lower than 100 °C by A. reducing its quantity. B. decreasing the external pressure. C. distilling it. D. increasing the external pressure.

Consider the following sketch of the solubility curve of some substances. Note: scroll down to download the free chemistry waec questions in pdf copy to view the sketch

At what temperature does the solubility of KNO 3, equal that of NaNO 3 ? A. 0°C B. 20 °C C. 30 °C D. 40 °C

When a salt is added to its saturated solution, the salt A. dissolves and the solution becomes super saturated. B. dissolves and the solution becomes unsaturated. C. precipitates and the solution remains unchanged. D. dissolves and crystals are formed.

When substance X was added to a solution of bromine water, the solution became colorless. X is likely to be A. propane. B. propanoic acid. C. propyne. D. propanol.

The preferential discharge of ions during electrolysis is influenced by the A. mechanism of electrolysis. B. electrolytic reactions. C. nature of the electrode. D. type of electrolytic cell.

The valence electrons of 12 Mg are in the A. 3s orbital. B. 2px orbital. C. 2s orbital. D. 1s orbital.

Stainless Steel is an alloy comprising of A. Fe and C. B. Fe and Ni. C. Fe, C and Ni. D. Fe, C and Al.

The number of hydrogen ions in 1.0 dm 3 of 0.02 moldm -3 tetraoxosulphate(VI) acid is [NA = 6.02 x 1023] A. 1.2 x 10 22 B. 1.2 x 10 23 . C. 2.4 x 10 22 . D. 2.4 x 10 23 .

The most suitable substance for putting out petrol fire is A. water. B. carbon(IV)oxide. C. fire blanket. D. sand.

The following factors would contribute to environmental pollution except A. production of ammonia. B. manufacture of cement. C. photosynthesis. D. combustion.

The position of equilibrium in a reversible reaction is affected by A. particle size of the reactants. B. vigorous stirring of the reaction mixture. C. presence of a catalyst. D. change in concentration of the reactants.

The diagram below illustrates a conical flask containing water and ice.

NOTE: scroll down and download the free chemistry pdf past questions to see the diagram

Which of the following statements about the diagram is correct? A. The water is at a lower temperature than the ice B. Energy is absorbed when the ice changes to water C. Energy is released when the ice changes to water D. The water molecules vibrate about a fixed point

Which of the following statements best explains the differences between a gas and a vapor? A. Unlike gases, vapors are liquids at room temperature B. Unlike gases, vapor can easily be condensed into liquids C. Unlike gases, vapour is readily converted into solids D. Vapours are generally denser than gases

Consider the following reaction equation: 2HCl + Ca(OH) 2 –> CaCl 2 + H 2 O. What is the volume of 0.1 moldrn -3 HCl that would completely neutralize 25cm 3 of 0.3 moldm -3 Ca(OH) 2 ? A. 150 cm 3 B. 75 cm 3 C. 30 cm 3 D. 25 cm 3

Cu and HNO 3 are not suitable for preparing hydrogen gas because of their A. reactivity and oxidation respectively. B. conductivity and corrosiveness respectively. C. melting point and reduction respectively. D. electro negativity and solubility respectively.

Which of the following formulae cannot be an empirical formula? A. CH B. CH2 C. P2O5 D. N204

One of the criteria for confirming the purity of benzene is to determine its A. heat capacity. B. boiling point. C. mass. D. colour.

Want more Chemistry Objective Test Questions like this? Get the Complete WAEC Chemistry Exam Past Questions and Answers (Obj and Essay) in PDF Format from us.

SSCE WAEC Chemistry Theory Questions

Chemistry Paper 2 Paper 2 will last for 2 hours This paper consists of two sections A and B. Answer one questions from Section A and three questions from Section B.

Credit will be given for clarity of expression and orderly presentation of material.

SECTION A (1ai) Define the term fermentation. (1aii) Name the catalyst that can be used for this process.

(b) Name two factors which determines the choice of an indicator for an acid-base titration. (c) Consider the following reaction equation: [Fe + H2S04 ] FeS04 + H2. Calculate the mass of unreacted iron when 5.0g of iron reacts with 10cm3 of 1.0 moldrrv3 H SO [Fe = 56.0] (d) Name one: (di) Heavy chemical used in electrolytic cells; (dii) Fine chemical used in textile industries.

(e) Explain briefly how a catalyst increases the rate of a chemical reaction. (f) (i) Write the chemical formula for the product formed when ethanoic acid reacts with ammonia. (ii) Give the name of the product formed in 1 (f) (i)..

(g) List three properties of aluminum that makes it suitable for the manufacture of drink can. (h) State two industrial uses of alkylalkanoates. (i) List two effects of global warming. (j) Name two steps involved in the crystallization of a salt from its solution.

Chemistry WAEC Essay Questions

SECTION B. 2ai. State the collision theory of reaction rates. 2aii.Using the collision theory, explain briefly how temperature can affect the rate of a chemical reaction.

bi. Sketch a graphical representation of Charles’s law. bii. Calculate the volume of oxygen that would be required for the complete combustion of 2.5moles of ethanol at s.t.p. [ molar volume at s.t.p = 22.4dm3]

ci. Define esterification. cii. Give two uses of alkanoates. ciii. Give the products of the alkaline hydrolysis of ethyl ethanoate.

d. A tin coated plate and a galvanized plate were exposed for the same length of time. di. Which of the two plates corrodes faster? dii. Explain briefly your answer in 2 (d) (i).

Want more Chemistry Theory Questions like this? Get the Complete WAEC Chemistry Exam Past Questions and Answer (Obj and Essay) in PDF Format from us.

Free WAEC Chemistry Exam Past Questions Download

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Link 1: WASSCE Chemistry Questions Booklet Link 2: WASSCE Chemistry Questions Booklet

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How to Pass NECO Chemistry: Objective and Essay Questions and Answers Explained (With Examples)

Chemistry is one of the core subjects in the Senior Secondary Certificate Examination (SSCE) administered by the National Examinations Council (NECO). It is a required subject for students who wish to study science-related courses at a higher institution. As a result, it is important to properly prepare for the NECO chemistry exam and score high marks.

In this article, we will provide you with some helpful information on how to prepare for the NECO chemistry exam, as well as some sample questions and answers for both the objective and essay sections. We will also give you some helpful tips on how to answer the questions correctly and avoid typical mistakes.

What is NECO Chemistry Exam?

The NECO chemistry exam is a test of your knowledge and comprehension of the fundamental ideas and principles of chemistry. It covers subjects like organic chemistry, physical chemistry, analytical chemistry, chemical reactions, the periodic table, and environmental chemistry. It also covers topics like atomic structure and chemical bonding.

The NECO chemistry exam is divided into two sections: Paper 1 consists of 60 multiple-choice questions that must be answered in one hour. Paper 2 contains two sections: Section A (Theory) and Section B (Practical). Section A contains six essay questions, four of which must be answered in two hours. Section B contains three practical questions, one of which you must answer in one hour.

The NECO chemistry exam has a total of  200 marks . Paper 1 carries 60 marks , Paper 2 Section A carries 80 marks , and Paper 2 Section B carries 60 marks . To pass the exam, you must score at least 50% on each paper.

Related Article: Lester B. Pearson Scholarship in Canada 2023-2024 [ Fully Funded]

How to Prepare for NECO Chemistry Exam?

You must do the following to properly prepare for the NECO chemistry exam:

• Thoroughly study the NECO chemistry syllabus and understand the objectives and outcomes of each topic.
• Review your class notes and textbooks on a regular basis to ensure you understand the key concepts, formulas, definitions, laws, and equations.
• Practice answering past questions and answers from previous years’ exams and mock tests. You can get them online or in bookstores.
• Revise your weak areas and clarify any uncertainties with your teachers or classmates.
• Attend revision classes or tutorials, if possible, and learn from your instructors’ feedback and corrections.
• Prepare your practical materials and equipment in advance, and become familiar with the procedures and safety rules.
• Before the exam, eat well, sleep well, and stay healthy. Avoid stressful situations and distractions that can affect your concentration and performance.

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NECO Chemistry Objective Questions and Answers 2023

The objective section of the NECO chemistry exam tests your ability to recall facts, recognize concepts, apply principles, analyze data, and solve problems. For each question, you must select the correct option from four alternatives (A, B, C, or D).

Here are some sample objective questions and answers for the NECO chemistry exam 2023:

• Which of the following elements has the highest electronegativity?

A) Fluorine B) Chlorine C) Oxygen D) Nitrogen Answer: A) Fluorine

2. What is the name of the compound with the formula CH₃COOH?

A) Methanoic acid B) Ethanoic acid C) Propanoic acid D) Butanoic acid Answer: B) Ethanoic acid

3. What is the oxidation number of sulfur in SO₄²⁻?

A) +2 B) +4 C) +6 D) +8 Answer: C) +6

4. What type of reaction occurs when zinc reacts with hydrochloric acid?

A) Combination reaction B) Decomposition reaction C) Displacement reaction D) Neutralization reaction Answer: C) Displacement reaction

5. What is the empirical formula of benzene?

A) CH B) CH₂ C) C₂H₂ D) C₂H₄ Answer: B) CH₂

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Tips for Answering Objective Questions

To answer the objective questions correctly, you need to follow these tips:

• Carefully read the question and fully understand what it is asking.
• Remove any options that are obviously incorrect or irrelevant.
• Choose the best option that fits the question based on your knowledge of chemistry and logic.
• If you are not sure of the answer, make an educated guess based on clues from the question or the options.
• Don’t spend too much time on one question. If you get stuck, move on to the next one and come back later if you have time.
• On the answer sheet, write your answers clearly and neatly. Do not make any stray marks or erase any marks.

NECO Chemistry Essay Questions and Answers 2023

The NECO chemistry exam essay section tests your ability to explain concepts, describe processes, compare and contrast phenomena, evaluate arguments, and communicate effectively. For each question, you must write detailed and coherent answers.

Here are some sample essay questions and answers for the NECO chemistry exam 2023:

• (a) Define the following terms:

(i) Atomic number (ii) Mass number (iii) Isotopes (b) Write the electronic configuration of the following elements: (i) Sodium (ii) Magnesium (iii) Chlorine (c) Draw the dot-and-cross diagram of sodium chloride.

(a) (i) The atomic number is the number of protons in the nucleus of an element’s atom. It determines the element’s identity as well as its chemical properties.

(ii) Mass number is the sum of the number of protons and neutrons in the nucleus of an atom of an element. It determines the mass and stability of the atom.

(iii) Isotopes are atoms of the same element with different numbers of neutrons in their nuclei. They have the same atomic number but different mass numbers.

(b) (i) Sodium has an atomic number of 11 and a mass number of 23. Its electronic configuration is 2,8,1 or 1s²2s²2p⁶3s¹.

(ii) Magnesium has an atomic number of 12 and a mass number of 24. Its electronic configuration is 2,8,2 or 1s²2s²2p⁶3s².

(iii) Chlorine has an atomic number of 17 and a mass number of 35. Its electronic configuration is 2,8,7 or 1s²2s²2p⁶3s²3p⁵.

(c) Sodium chloride is formed when one electron is transferred from sodium to chlorine, resulting in the formation of sodium ion (Na+) and chloride ion (Cl).

2. (a) State two differences between metals and non-metals based on their physical properties. (b) Give two examples of metals and two examples of non-metals. (c) Explain why metals are good conductors of electricity.

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(a) The following are two physical property distinctions between metals and nonmetals:

• Nonmetals have low melting and boiling points, whereas metals have high melting and boiling points.
• Metals are malleable and ductile, whereas nonmetals are brittle and easily broken.

(b) Two examples of metals are iron and copper . Two examples of non-metals are oxygen and carbon .

(c) Metals are good conductors of electricity because their outermost shells contain free electrons that can easily move through the metal lattice when a potential difference is applied across it. These free electrons transfer electric charge from one end to the other, resulting in an electric current.

3. (a) Define the term acid-base titration. (b) List two types of indicators used in acid-base titrations and state their colour changes. (c) Write a balanced equation for the reaction between hydrochloric acid and sodium hydroxide.

(a) Acid-base titration is a laboratory technique for determining the concentration of an acid or a base by neutralizing it with a known-concentration standard solution of the opposite type.

(b) Two types of indicators used in acid-base titrations are:

• Methyl orange: In acidic solutions, it turns red; in alkaline solutions, it turns yellow.
• Phenolphthalein: In acidic solutions, it is colorless; in alkaline solutions, it is pink.

(c) The balanced equation for the reaction between hydrochloric acid and sodium hydroxide is:

HCl + NaOH → NaCl + H₂O

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In this article, we have provided you with some useful information on how to prepare for the NECO chemistry exam in 2023, as well as some sample questions and answers for both the objective and essay sections. We hope that this article will help you pass the exam and achieve your academic goals. Goodluck in your exams!

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NECO Chemistry Questions and Answers 2023/2024 (Essay and Objectives)

NECO Chemistry Questions and Answers 2023. I will be showing you past Chemistry objectives and theory repeated questions for free in this post. You will also understand how  NECO  Chemistry questions are set and how to answer them.

The National Examinations Council (NECO) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January respectively.

Table of Contents

NECO Chemistry Objectives and Essay Answers 2023 (Expo)

The 2023 NECO Chemistry expo will be posted here today 24th July during the NECO Chemistry examination. Keep checking and reloading this page for the answers.

NECO 2023 Chemistry Answers Loading.

OBJ Answers:

1-10: DEADADECAD

11-20: BAEDDBDBAE

21-30: CCDCABDDCD

31-40: EBEECEBCEE

41-50: BCCECDDADD

51-60: DABBDEAECA

————————————————————————————————————-

NECO Chemistry Questions and Answers For Practice

The following NECO Chemistry questions are questions to expect in the 2023 NECO examination.

1. The minimum amount of energy required for effective collisions between reacting particles is known A) Activation energy B) Bond energy C) Kinetic energy D) Potential energy

2. The bond formed between H2OH2O and H+H+ to form the hydroxonium H3O+H3O+ is A) Dative B) Covalent C) Electrovalent D) Ionic

3. An element XX forms the following oxides X2O,XOX2O,XO and XO2.XO2. This phenomenon illustrates the law of ________. A) Conservation of mass B) Definite proportion C) Mass action D) Multiple proportion

4.. How many moles of oxygen would contain 1.204×10241.204×1024 molecules? NB: Avogadro’s constant (NA) =6.02×1023=6.02×1023 A) 1 B) 2 C) 3 D) 4

See: NECO Timetable

5. Which of the following statements about solids is correct? A) Solid particles are less orderly than those of a liquid B) Solid have lower densities than liquids C) Solid particles have greater kinetic energies than those of liquids D) Solid particles cannot be easily compressed

6. Which of the following apparatus can be used to measure a specific volume of a liquid accurately? A) Beaker B) Conical flask C) Measuring cyclinder D) Pipette

7. The general gas equation PVT=KPVT=K is a combination of A) Boyle’s and Charles’ laws B) Boyle’s and Graham’s laws C) Charles’ and Graham’s laws D) Dalton’s and Graham’s laws

8. The spreading of the scent of a flower in a garden is an example of? A) Brownian motion B) Diffusion C) Osmosis D) Tynadal effect

9. Propane and carbon (IV) oxide diffuse at the same rate because [H = 1.00, C = 12.0, O = 16.0] Options A) They are both gases B) Their molecules contain carbon C) They have the same relative molecular mass D) Both are denser than air

1O. The energy which accompanies the addition of an electron to an isolated gaseous atom is A) Atomization B) Electronegativity C) Electron affinity D) Ionization

11. A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by A. boiling the water B. adding excess calcium hydroxide C. adding a calculated amount of calcium hydroxide D. adding sodium carbonate E. adding magnesium hydroxide

12. During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment, A. the litmus turns blue but no gas is evolved B. the litmus turns blue and oxygen is evolved C. the litmus turns blue and hydrogen is evolved D. the litmus turns red and oxygen is evolved E. the litmus turns red and then becomes colourless

13. The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as; A. saponification B. dehydration C. esterification D. hydrolysis E. hydration

14. The IUPAC names of the compounds CH3COOH and CH2=CH2 are respectively; A. acetic acid and ethane B. ethanoic acid and ethene C. methanoic acid and ethylene D. ethanol and ethene E. acetic acid and ethylene

15. If 30cm3 of oxygen diffuses through a porous pot in 7 seconds, how long will it take 60cm3 of chlorine to diffuse through the same pot, if the vapour densities of oxygen and chlorine are 16 and 36 respectively? A. 9.3 sec B. 14 sec C. 21 sec D. 28 sec E. 30.3 sec

16. When heat is absorbed during a chemical reaction, the reaction is said to be A. thermodynamic B. exothermic C. isothermal D. endothermic E. thermostatic

17. When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as A. disintegration B. polymerization C. cracking D. degradation E. distillation

18. The pH of four solutions W, X, Y, Z are 4, 6, 8, 10 respectively, therefore A. none of these solutions is acidic B. the pH of Y is made more acidic by addition of distilled water C. Z is the most acidic solution D. W is the most acidic solution E. X is neutral

19. When each of the nitrates of Potassium, Magnesium and iron is heated, A. all the nitrates decompose to their oxides B. the nitrate of magnesium gives the nitrite and oxygen C. the nitrates of iron magnesium and iron give the oxides D. the nitrate of iron gives the nitrite and oxygen E. the nitrate of the magnesium is not decomposed

2O. Which of the following metals cannot replace hydrogen from water or steam? A. Sodium B. Magnesium C. Iron D. Calcium E. Copper

21. small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone A. distillation B. sublimation C. precipitation D. evaporation E. decomposition

22. Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore, A. P will form an electrovalent bond with R B. Q will form a covalent bond with S C. R will form an electrovalent bond with S D. Q will form an electrovalent bond with S E. Q will form a covalent bond with R

23. An element X forms the following compounds with chlorine; XCl4, XCl3, XCl2. This illustrates the A. law of multiple proportions B. law of chemical proportions C. law of simple proportions D. law of conservation of mass E. law of definite proportions

24. The oxidation state of chlorine in potassium chlorate is A. +1 B. +2 C. +3 D. +5 E. +7

25. 10 When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are; A. nitrogen and carbondioxide B. the rare gases C. nitrogen and oxygen D. nitrogen and the rare gases E. nitrogen, carbondioxide and the rare

26. Which of the following statements is NOT correct? A. The average kinetic energy of a gas is directly proportional to its temperature B. At constant tempearture, the volume of a gas increases as the pressure increases C. The pressure of a gas is inversely proportional to its volume D. The temperature of a gas is directly proportional to its volume E. The collisions of molecules with each other are inelastic

27. Zinc Oxide is a A. Basic Oxide B. Acidic Oxide C. Amphoteric Oxide D. Neutral Oxide E. Reactive Oxide

28. When sodium chloride and metallic sodium are each dissolved in water A. both processes are exothermic B. both processes are endothermic C. the dissolution of metallic sodium is endothermic D. the dissolution of metallic sodium is exothermic E. the dissolution of sodium chloride is explosive

29. The periodic classification of elements is an arrangement of the elements in order of their A. Atomic Weights B. Isotopic Weights C. Molecular Weights D. Atomic Numbers E. Atomic Masses

3O. In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm3 of 1.25 molar sulphuric acid? A. 5cm3 B. 10cm3 C. 20cm3 D. 25cm3 E. 50cm3

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NECO Chemistry Questions And Answers 2023 (Paper 2)

Don’t worry about these NECO Chemistry Questions And Answers 2023. All you need to do is to keep on refreshing this page for the 2023 NECO Chemistry Questions And Answers for this year. It will be posted here in few minutes.

Tips on How to Pass 2023 NECO Chemistry Examinations

The following guidelines will help you pass the 2023 NECO Chemistry examination with flying colours.

Have a Target and Work Towards Actualizing it 

You have decided to pass NECO Chemistry 2023 and I am sure of that. Now, the next thing you should do is set targets.

You have told yourself, “I will score A in NECO Chemistry 2023”, that’s not all. You need to plan on how to make it happen. Create a timetable and master plan to achieve your goals.

 Get the Recommended Textbook on Chemistry for 2023 NECO Examination

Normally, NECO recommends books for the examination. But apart from NECO Literature in English where certain novels are compulsory, you are free to use any good Chemistry textbook to prepare for NECO 2023 exam.

Some textbooks are more difficult to understand. If you have any topic you are finding difficult to understand, then get a textbook that will simplify the topics and make life better for you.

 Do not Skip Chemistry Examples and Exercise you Will Come Across While Reading: 

Many candidates are fond of skipping exercises and even examples while studying textbooks. In fact, we like notebooks so much that we could ask, “can I read my notebook and pass NECO Chemistry 2023?” Don’t be scared of attempting exercises in Biology. Face the challenges.

If you have any questions about the  NECO Chemistry Questions and Answers 2023 , kindly drop your question in the comment box.

Last Updated on July 25, 2023 by Admin

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122 thoughts on “NECO Chemistry Questions and Answers 2023/2024 (Essay and Objectives)”

Please when will the answer come up

I just need questions for the two

I am really greatfull for the coperation you showed to us most especially me if not for you guys thisneco would have been trouble so sincear thank you

WHERE IS THE ANSWER FOR THE OBJ QUESTIONS THAT IS UP THERE

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2023 Neco Chemistry Essay and Objective Questions and Answers Expo

July 23, 2023 Kazeem Neco expo , Waec Daily Updates 0

Table of Contents

2023 Neco Chemistry Essay and Objective Questions and Answers

The National Examination Council (NECO) Has Scheduled The 2023 Neco Chemistry Essay and Objective Questions and Answers Paper To Kick of on Monday 24th July 2023.

This brings the attention of candidates writing the exam in to searching for 2023 Neco Chemistry Essay and Objective Questions and Answers , 2023 NECO Chemistry Essay and Objective Expo 2023, Neco chemistry essay and objective 2023 and etc.

In this section, you will read the steps and requirements needed for you to get 2023 Neco Chemistry Essay and Objective 2023 Questions And Answers before exam.

NECO Chemistry Essay and Objective 2023 Paper is Categorized in to 2 parts;

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The science competitions your students can enter this year

By Emma Molloy

Discover STEM-themed competitions for you and your students to enter in this academic year

Source: © Shutterstock

Learn about the fantastic array of science competitions your students can enter – so you can sign up as soon as possible

There is a great range of science competitions out there that your students can enter. Competitions come in all shapes and sizes, including essay writing, photography and video competitions, and can be local or national events.

Besides the array of downloadable materials you can make use of in your lessons, as homework or part of a science club, the benefits of taking part include learning how to work in a team, grasping how lessons apply to real-world problems, and there could even be some extra cash to bag!

You can jump straight to the lists of science-writing competitions , or more arty competitions (such as photography and drawing prizes), or simply read on to discover what’s open to you and your students this academic year.

These competitions have been ordered by closing date. Listing a competition does not serve as an endorsement by the RSC.  Last updated: 16 May 2024.

Cambridge Chemistry Challenge

Age: 19 or younger

Registration opens: now

Closes:  1 June 2024

This competition — aimed at Year 12 students but available to younger students — is designed to stretch and challenge students beyond the curriculum interested in chemistry and is excellent experience for anyone considering chemistry for further study.

Students sit a 90-minute written paper under exam conditions in school, which is sent out to schools in advance. Mark schemes are available to teachers, and for schools submitting more than five scripts, these should be marked by the teacher. Scripts of students scoring over 50% are then submitted. Students who perform well receive a certificate and the best performers are invited to join a residential camp at the University of Cambridge at the end of August

The website contains lots of past papers and mark schemes, which are a valuable resource for teachers. Full details are on the  website .

Science meets art

If you have some students who would be hooked by the artistic side of science, check out these competitions:

• RSB Photography competition (open to all ages; opens March 2024; £500 top prize for under 18s)
• RSB Nancy Rothwell Award for specimen drawing (ages 7–18; open March–July 2024; prizes include set of drawing pencils and small cash prizes for students and schools)
• Science Without Borders challenge is an artwork competition with a focus on ocean conservation. The 2024 theme is ‘hidden wonders of the deep’ (ages 11–19; closes 4 March 2024; maximum prize of $500)
• British Science Week poster competition ; this year’s theme will be ‘time’ (ages 3–14; closes March 2024)
• RPS Woman Science Photographer of the Year is open to women of all ages and backgrounds (open and under 18s; closing date TBC but expected March 2024)
• Minds Underground Competitions ; Minds Underground run a number of essay competitions each year covering a variety of STEM and other topics (all ages; closing dates vary but 2024 questions will be released January 2024, see website for full details)

UKBC Intermediate Biology Olympiad

Age: Students in first year of 16+ education

Registration opens: now open

Competition dates: 5–12 June 2024

This international, annual competition is open to students in the first year of post-16 education in the UK. The competition consists of a one-hour multiple choice paper that is taken online under formal exam conditions. Questions cover topics students will be familiar with alongside some new concepts to test their problem-solving skills and understanding of core principals.

Practice papers are available to print to help students prepare. The competition is free to enter for UK schools and participants receive an e-certificate that recognises their level of achievement.

Find more information, including registering your school to take part, on the  UKBC website .

Science writing competitions

Numerous essays competitions run each year covering all aspects and areas of STEM. Below is just a selection of some of the competitions out there. Entries into science writing competitions make great additions to UCAS applications, and they get students thinking about science, too.

• The Oxford Scientist Schools’ Science Writing Competition  (700-word magazine article; ages 15–18; deadline likely to be July 2024; prize includes £50 and being published in the magazine)
• Newnham College, Camb ridge (2000-word academic essay; age 16–18 women at state school only; deadline 8 July 2024; winners receive up to £400 to split with their school). Teachers can sign up to mailing lists now to hear more about this essay competition and other events from the college.

IET Faraday Challenge

Registration opens: January 2024 for the 2024–2025 season

Closes: July 2024

Faraday Challenges  are cross-curricular STEM activity days for UK schools run by the Institution of Engineering and Technology. This annual competition draws on students’ practical science and engineering skills, asking them to work in teams to solve real-world engineering problems and think creatively. Schools can host Challenge Days and invite teams from local schools to join them or apply to join a day at another school. Planning for these events starts early, so plenty of time to get organised for the day.

Teams should be made up of six students aged 12–13 years old (England and Wales Year 8, Scotland S1/S2, Northern Ireland Year 9). Schools may host a challenge day themselves or attend one hosted at another school.

Students win prizes for themselves and a trophy for their school. There is also a national league table and the top teams from across the UK go through to the national final, with the chance to win a cash prize of up to £1000 for their school. Plus, by taking part students will also meet the criteria for achieving a CREST Discovery Award.

If you are not able to enter into the main competition, there is also the opportunity for students to take part in the  Virtual Faraday Challenge  open to anyone aged 7–15.

Local to Newcastle?

Newcastle Secondary School SciFair  is a university-run secondary school science fair for students from state schools across Newcastle. Sci-Fair is a whole day event that will take place during British Science Week. Students can get the opportunity to present their models, posters or PowerPoint presentations about a scientific topic of their choosing. SciFair is open to ages 11–16. There are multiple prizes to be won on the day to recognise student’s efforts. Spaces are limited capacity, so students should wait for their projects to be approved before starting work.

EMBL Art and Science Project

Age: 14–18 Participation deadline: 31 August 2024

Discover the world of proteins with the European Molecular Biology Laboratory, and create an artwork inspired by what you’ve learned. Cash prizes of up to €100.

Visit the website to find out more. 

Deadlines passed:

Stockholm uk junior water prize.

Submissions open: 29 Feb 2024

Submission deadline: 13 May 2024

This prize challenges young people in STEM to develop innovative yet practical solutions to the global water crisis. Entrants decide on a topic or problem that they want to investigate and undertake background research and experimental work before submitting a full written report.

Students whose reports are shortlisted get to present their work virtually to the judges. The winning UK entry receives £1,000 cash prize and a fully funded trip to represent the UK and their school at the Stockholm Junior Water Prize competition in Sweden in August and be in with a chance to win the international grand prize of US$15,000!

Learn more on the  website .

UKBC Biology Challenge

Competition dates: 1–17 May 2024

The Biology Challenge is a fun, annual competition open to students aged 13–15 in the UK. The challenge compromises of two, 25-minute, multiple-choice papers, and students need to complete both papers to be considered for an award category.

The questions set cover the school curriculum, but also caters to budding biologists whose knowledge has been enhanced by reading books and magazines, watching natural history programmes and taking a keen interest in all things biology.

Practice papers are available to help students prepare. The competition is free to enter for UK schools and participants receive an e-certificate that recognises their category of achievement.

Find more information and register your school to take part on the  Biology Challenge website .

BIEA Youth STEAM Competition

Registration opens:  October 2023

Closes: April 2024 for first-round submissions

The  BIEA Youth STEAM Competition  asks students to use their creativity to come up with ideas for a more sustainable future based on a specific theme. The theme for 2024 has yet to be announced, but the theme for 2023 was “developing solutions for sustainable cities”. Students research, design and present their solution, including a written report.

Students can enter as individuals or in teams of up to five members and schools can enter more than one team. There are lots of competition categories to cover all age groups. Submissions are expected to be accepted from January 2024 and the international final to be in July 2024. Learn more on the competition  website .

Royal College of Science Union (RCSU) Science Challenge

Registration opens:  1 March 2024

Closes: 26 April 2024

Imperial College London’s RCSU Science Challenge is all about science communication – requiring students to demonstrate their skills in debate and reasoning and teach the public about science and its consequences. Questions on a given theme are set by eminent scientists – who even read the shortlisted entries, so there’s a real chance students’ work will be seen by world-leading academics. This year’s theme is Hidden depth.

Students can answer one of the questions in either written or video form of up to 1000 words or three minutes, 30 seconds, respectively. Winners receive cash prizes, plus there are non-cash prizes for the runners up.

Shortlisted candidates will be invited to the grand final on 21 June 2024 at the Royal Institution, where they will deliver a short presentation. Find more information about taking part on the  challenge website .

Unsung Heroes of Science video competition

Close s: 30 April 2024

The International  Unsung Heroes of Science video competition   from Hertford College, University of Oxford is open to all 16–18 students. Entrants are tasked with making a two-minute video sharing the story of a scientist whose contributions were overlooked. Entries can be submitted by individuals or in teams of up to three.

The competition website also has lesson plans and links to videos of previous unsung heros, which are great resources for teachers to inspire their students.

British Science Week poster competition

Age: 3–14 Registration opened: January 2024 Closes: March 2024

British Science Week will run from 8–17 March. Alongside numerous activities and events across the country, there will be a themed poster competition – and this year’s theme will is ‘time’.

Entrants can explore a wide range of ideas covered by the broad theme. Judges are on the look out for an innovative angle or creative interpretation of the theme; clear, accurate and informative content; and effective, engaging communication. This competition is a great way for students to practise their communication skills. There are numerous prizes up for grabs that cover all age categories.

Entrants can be teams or individuals from any organisation, although schools are limited to five entries. Find out more on the  website , including activity packs and other resources to make the most of British Science Week.

Big Bang Young Scientists and Engineers Competition

Age: 11–18 Registration opens:  October 2023 Closes: 27 March 2024

The Big Bang Competition  is open to young people aged 11 to 18 in state-funded education or who are home educated or who enter as part of a community group. Private school participants can get involved as part of a collaboration with state-school peers.

Participants complete project-based work, focusing on investigation, discovery and use of scientific methods. Students choose their own STEM topic and work to submit their project as a written report or short video. The possibilities are endless!

Students can include their involvement in the competition in their extracurricular activities on UCAS forms and personal statements and have a chance of winning a range of awards and cash prizes.

Find out how to get started and get inspired with past projects on the  Big Bang website .

MathWorks Math Modeling challenge

Age: 16–19 (England and Wales only) Registration opens:  November 2023 Closes: 24 February 2024

The  M3 Challenge  is an internet-based applied maths competition that inspires participants to pursue STEM education and careers. Working in teams of three to five students, participants have 14 consecutive hours to solve an open-ended maths-modelling problem based around a real issue during the challenge weekend, 1–4 March 2024.

The problem typically has a socially conscious theme – equity, the environment, conservation or recycling, energy use, health, and other topics that young people care about. The challenge gives students the opportunity to use maths modelling processes to represent, analyse, make predictions and otherwise provide insight into real-world phenomena. For example, 2023’s problem centred around modelling the impacts of e-bikes to better understand if they are likely to become part of a global, more sustainable energy plan.

Numerous free  resources , including modelling and coding handbooks, videos and sample problems are available to help teams prepare for the event.

The competition’s final presentation and awards ceremony event is held in New York City in late April – an all-expense paid experience for the finalist teams. These top teams will be awarded scholarships toward the pursuit of higher education, with members of the overall winning team receiving $20,000 (»£16,000).

For rules, resources and to register, visit the competition  website .

The Cambridge Upper Secondary Science Competition

Age: 16–18 Registration opens: now Closes:  30 September 2023 and 31 March 2024

The  Cambridge Upper Secondary Science Competition , run by Cambridge Assessment, is an exciting extra-curricular activity for teams of aspiring scientists who are studying with the Cambridge IGCSE or O Level science programmes.

Teams of three to six students choose a topic and work on a scientific investigation over 20–25 hours. The competition encourages investigations with some practical or community relevance and an eye on sustainability.

Projects may involve laboratory work and should include creative and collaborative working, critical thinking and reflection. Students should be given the opportunity to present their results to a wider audience, perhaps at a science fair or other school event.

Teachers provide initial project evaluations and the best are put forward for consideration by a panel of experts. The winning team receives a certificate and is featured on the competition website. The competition runs twice a year, so keep abreast of all the dates  on the website .

TeenTech Awards 

Age: 11–16 Registration opens: now Closes:  March 2024 for first-round submissions

The  TeenTech Awards  encourage students to see how they might apply science and technology to real-world problems across several different categories, from food and retail through the future of transport to wearable technology. Students identify an opportunity or a problem, suggest a solution and research the market.

Students can work in teams of up to three people and there are lots of award categories. All submitted projects receive feedback and a bronze, silver or gold award. The event is well supported with training sessions for teachers and students, so everyone knows what to expect and what the judges will be looking for!

The best projects go forward to the TeenTech Awards Final for judging and the winning school in each category will receive a cash prize. The final is expected to take place in London in June 2024.

Schools’ Analyst

Age: 16–17 Registration opens: soon Closes: 23 February 2024

The  Schools’ Analyst Competition  is returning to schools in 2024. Run collaboratively by the Analytical Chemistry Trust Fund and the Royal Society of Chemistry, this event allows students to expand their chemistry knowledge and skills through practical analytical experiments. Students must be in Year 12 (England, Wales, NI)/S5 (Scotland)/5th Year (Ireland).

Schools and colleges register their interest to host a heat and, if randomly selected, can now enter up to 25 teams of three students to compete to be crowned the overall school winner. Each winning school team will then compete within their region to find regional winners. Regional winners receive a cash prize for themselves and their school.

Register your school  to take part by 23 February 2024. To take part, students only need access to standard school laboratory equipment and some consumables (a bursary is available for those who need it).

Equipment boxes are sent to 400 entrants, selected at random, and delivered in advance of the event. Results must be submitted by 17 May in Ireland (to ensure schools have the chance to award winners before the summer holidays) and 14 June elsewhere.

Slingshot Challenge

Age: 13–18 Registration opens: now Closes: 1 February 2024

The  Slingshot Challenge  is run by National Geographic and is an exciting opportunity for students to get involved with the global programme. Students can enter in teams of up to six. Individual entries are welcomed although all entries are expected to involve collaboration with peers, stakeholders, and/or marginalized communities.

Students work to prepare a short, 1-minute video, from topics with an environmental focus. Training sessions for teachers and resource/tool kits are available from the website and the providers can offer feedback and technical support ahead of official submissions.

Videos are expected to put forward compelling, evidence-based information and be engaging for the audience. A small number of motivating prizes are awarded each year to the student of up to $10,000.

For full details see the  Slingshot Challenge website .

UK Chemistry Olympiad 

Age: 16–18 (recommended) Registration opens: September 2023 Closes: January 2024

Run by the RSC, the  UK Chemistry Olympiad  is designed to challenge and inspire older secondary-school students, by encouraging them to push themselves, boost their critical problem-solving skills and test their knowledge in real-world situations.  Explore past papers  to get an idea of the types of questions involved.

There are three rounds that culminate with the prestigious  International Chemistry Olympiad , which will take place this year in Riyadh, Saudi Arabia. Round 1, a written test taken in your school, is scheduled to take place on 25 January 2024. Students then receive bronze, silver or gold certificates depending on their scores. Up to 30 students will then be selected to move on to the second round – a training weekend at the University of Nottingham. Four students will then be chosen to represent the UK in the international competition from 21–30 July 2024.

To get started, register your school or college. Do this and find out more information about preparing on the  Olympiad homepage .

Top of the Bench

Age: 14–16 Registration opens: soon Closes: January 2024

Top of the Bench  (TOTB) is an annual practical chemistry competition that has been running for over 20 years. It’s a long-standing favourite for students and teachers, and provides an opportunity for students to put their teamwork and practical skills to the test.

Regional heats are led by  RSC local sections  between October and January. The winning team from each heat progresses to the national final, held in the spring at a UK university (where there is also a session for teachers to explore resources and classroom ideas with one of the RSC’s education coordinators).

First prize is awarded to the best overall school performance, with five teams receiving runners up prizes. The Jacqui Clee Award is also awarded each year to the student who makes an outstanding individual contribution.

Teams must consist of four students: two from year 9/S2; one from year 10/S3; one from year 11/S4.

Find more information including past papers and how to apply on the  TOTB homepage .

Imperial College Science & Innovation Competition

Age:  4–adult Registration opens:  September  2023 Closes:  15 December 2023

The  Science & Innovation Competition , run by the Faculty of Natural Sciences at Imperial College, aims to motivate primary and secondary-aged children to engage with science, to encourage them to work as part of a team and engage in fun activities. Adults are also welcome to enter.

Teams of two to four people are asked to develop a new and innovative scientific solution to help achieve one of the  United Nation’s Global Goals for Sustainable Development . To enter, teams need to create a five-minute film that describes the science behind their idea. Finalists are invited to take part in an event during spring 2024 at Imperial College, London (date to be confirmed). Learn more on the  website .

Global essay competition: Young voices in the chemical sciences for sustainability

Age: 35 and under  Registration opens: now Closes: 31 March 2023

An  annual essay competition  on the role of the chemical sciences in sustainability, organised by the International Organization for Chemical Sciences in Development (IOCD) in collaboration with the Royal Society of Chemistry (RSC). The competition is open globally to entrants under 35 years of age. The theme for the 2023 competition is: How can the chemical sciences lead the stewardship of the Earth’s element resources?

Essays will be grouped into seven regions for shortlisting and selection of winners, based on the entrant’s country of normal residence. Each regional winner will receive a prize of US$500 and their entries will be published in  RSC Sustainability . The shortlisted essays will be collected in an annual compendium,  Young voices in the chemical sciences for sustainability , available on the IOCD’s website. Individual shortlisted entries will also be featured from time to time on IOCD’s website.

Essays will be judged on how well they highlight the importance of scientific approaches grounded in the chemical sciences for solving sustainability challenges. Entrants should take a broad, global perspective, and reflect on the intersection of science, society and policy aspects, rather than describing a particular scientific advance in great technical detail. Essays must not exceed 1500 words of body copy.

Cambridge Chemistry Race

Age: 16–18 Registration opens: Mon 5 December 2022 Closes: February 2023

In the  Cambridge Chemistry Race , teams of 3–5 students solve as many theoretical problems as they can over the course of two hours – ranging from easy riddles to tasks of A-level difficulty and complex chemical problems.

Once a team has solved a question, the examiner verifies their answer and hands them the next question. Points are awarded based on the number of successful attempts. Whoever gets the most points wins!

Students are allowed to use a calculator, books, notes, and printed literature. The challenge aims to test problem-solving skills and chemical understanding rather than knowledge. Explore past questions and solutions  here  to get an idea of what’s in store.

Schools may only enter one team each and places are first come first served.

The competition is run in collaboration with the University of Cambridge’s Department of Chemistry. This year, it is joined by the University of Oxford too, so students may compete in either city. The competition will take place on Saturday 4 February 2023. Learn more on the  competition website .

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WAEC Chemistry Questions and Answers 2024 Objectives and Essay

• Post author: Study Admin
• Post published: November 19, 2023
• Post category: School News
• Post comments: 0 Comments

WAEC chemistry 2024 answers are now available. WAEC chemistry questions and answers 2024/2025 objective and essay and other exam details for WASSCE 2024 are on this page. See the 2024 WAEC chemistry answers for both objective and theory below. Get the WAEC chemistry objective and essay answers here.

The 2024 chemistry WAEC OBJ and theory questions and answers are provided here for free. All you have to do is to go through the questions and take note of the WAEC chemistry answers 2024. Read on to find out.

WAEC Chemistry Questions and Answers 2024 Objective and Essay

Have you been searching on Google in order to get the WASSCE chemistry questions and answers 2024? If so, we have got you covered!

We have the 2024 WAEC chemistry questions and our team of experts will soon upload the WAEC chemistry questions and their accurate answers to help you pass the 2024 WAEC chemistry examination.

The 2024 WAEC chemistry theory questions and OBJ will be uploaded any moment from now. So if you are searching for the WAEC chemistry answers 2024 for objective and theory, then you are on the right page. See WAEC chemistry objective and essay questions and answers below.

WAEC Chemistry Answers 2024 Objective and Theory

The West Africa Examinations Council (WAEC) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in May/June and November/December respectively.

The 2024 WAEC chemistry questions are set from the SS1 to SS3 chemistry syllabus. So all the questions you will encounter in this year’s examination are in the syllabus, and nearly 90% of the questions are repeated.

You don’t have to worry about the 2024 WAEC chemistry questions and answers PDF (essay and objective). The WAEC chemistry answers 2024 will be uploaded any moment from now. All you need to do is to keep refreshing this page so as not to miss out.

Once again, keep refreshing this page because we will upload the original WAEC chemistry questions and answers for this year’s exams on this page at any moment from now. Also, to download the past questions and answers, click on this link WAEC chemistry past questions .

If you have any questions about the WAEC chemistry questions 2024 and answers, feel free to use the comment box below or use the Chat With Us button and we will respond immediately.

The 2024 WAEC chemistry answers will be posted here. Be patient. Keep checking and reloading this page for the correct answers. WAEC 2024 chemistry answers loading…….

There is nothing like WAEC chemistry expo 2024 online. All students are advised to avoid all patronizing online fraudsters/vendors who claim to provide such services.

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AP Inter 1st Year Chemistry Question Paper March 2023

Access to a variety of AP Inter 1st Year Chemistry Model Papers and AP Inter 1st Year Chemistry Question Paper March 2023 helps students overcome exam anxiety by fostering familiarity. question patterns.

Note : Read the following instructions carefully.

• Answer all the questions of Section – A. Answer any six questions in Section – B and answer ANY TWO questions in Section – C.
• In Section – A, questions from Sr. Nos. 1 to 10 are of “Very short answer type”. Each question carries two marks. Every answer may be limited to 5 lines. Answer all these questions at one place in the same order.
• In Section – B, questions from Sr. Nos. 11 to 18 are of “Short answer type”. Each question carries four marks. Every answer may be limited to 75 words.
• In Section – C, questions from Sr. Nos. 19 to 21 are of “Long answer type”. Each question carries eight marks. Every answer may be limited to 300 Words.
• Draw labelled diagrams, wherever necessary for questions in Section – B and C.

Section – A

Note : Answer ALL the questions.

Question 1. Name two adverse effects caused by csid rains.

Question 2. What is Lewis acid? Give one example.

Question 3. Give the values of gas constant R in different units.

Question 4. What happens when magnesium metal is burnt in air ?

Question 5. How many number of moles of glucose are present in 540 gms of glucose ?

Question 6. What are the AH sign conventions for exothermic and en-dothermic reactions?

Question 7. Write the conformations of ethane.

Question 8. State the Hess’s Law of Constant Heat Summation.

Question 9. Why is Gypsum added to Cement ?

Question 10. What is Chemical Oxygen Demend (COD)?

Section – B

Note : Answer ANY SIX questions. (6 × 4 = 24)

Question 11. Write a few lines on the utility of hydrogen as a fuel.

Question 12. Explain the difference in properties of diamond and graph-ite on the basis of their structure.

Question 13. State Fajan’s rules and give suitable examples.

Question 14. Deduce (a) Graham’s law and (b) Dalton’s law from Kinetic gas equation.

Question 15. What is Le Chatelier’s principle ? Discuss the application of Le Chatelier’s principle for the industrial synthesis of Ammonia.

Question 16. Chemical analysis of a carbon compound gave the following percentage composition by weight of the elements present, carbon = 10.06%, hydrogen = 0.84%, chlorine = 89.10%, calculate the empirical formula of the compound.

Question 17. Write any two methods of preparation of diborane.

Question 18. Explain the formation of coordinate covalent bond with one example.

SECTION – C

Note : Answer ANY TWO questions. (2 × 8 = 16)

Question 19. Describe two methods of preparation of ethane. Give any three reactions of ethane.

Question 20. What are the postulates of Bohr’s model of hydrogen atom? Discuss the importance of this model to explain various series of line spectra in hydrogen atom.

Question 21. Write an essay on s, p, d, f block elements

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CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.

Chemistry Theory And Objective: Questions  & Answers For 2022/2023 WAEC Exam. Are you a student who wants to make a good grade in Chemistry? Here are the WAEC Chemistry questions and everything you need to know about 2021 WAEC Chemistry. This post provides provided for you with all you need to know in Chemistry Paper 1 (Objective) and Chemistry 2 (Essay).

Table of Contents

Welcome to the Chemistry Theory and Objective: Questions & Answers for the 2022/2023 WAEC Exam. This comprehensive guide has been designed to assist students in their preparation for the upcoming WAEC Chemistry examination. It presents a collection of theory and objective questions along with their corresponding answers, covering the essential topics and concepts outlined in the WAEC syllabus. By studying and practicing these questions, you will gain a solid foundation in chemistry and improve your chances of achieving excellent results in the exam. So let’s delve into the world of chemistry and embark on a journey of learning and success.

The Question & Answers: CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.

Furthermore, below are the WAEC Chemistry questions. Read them properly. In fact, they will make you ready to score high in your WAEC Chemistry exam.

The West Africa Examination Council (WAEC) is an examination body in Nigeria. It has the statutory power to conduct the Senior Secondary Certificate Examination in May/June and the General Certificate in Education in November/December.

THE OBJECTIVE OF POST: CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.

Because people are asking about WAEC Chemistry and objective questions and answer 2022/2023. In fact, they are also asking for JAMB 2022 CHEMISTRY questions and answers pdf, The solutions are the objectives of this post. This post, therefore, takes care of those students who plan to do well in the WAEC exams this year.

The best way to read this post is to read it by clicking the highlighted topics for referencing. So check out these related topics that follow.

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CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.

General tips and advice to help you prepare for your exams effectively..

• Study the syllabus: Familiarize yourself with the syllabus for your respective exams. Understand the topics and concepts that are likely to be covered and focus your preparation accordingly.
• Review past papers: Practice solving past exam papers to get an idea of the types of questions that may be asked. This will help you become familiar with the exam format and identify any areas where you need further improvement.
• Understand the concepts: Chemistry involves understanding fundamental concepts and principles. Ensure you have a strong foundation by studying the theory thoroughly. Take notes, create summaries, and use diagrams or visual aids to help you grasp complex concepts.
• Practice problem-solving: Chemistry often requires application and problem-solving skills. Practice solving numerical problems and chemical equations regularly to strengthen your problem-solving abilities. This will also help you become more familiar with the calculations and techniques needed for the exam.
• Seek clarification: If you come across any challenging topics or concepts, don’t hesitate to seek clarification from your teachers, classmates, or online resources. Understanding the material thoroughly will boost your confidence during the exam. CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM..
• Create a study schedule: Plan your study sessions and allocate sufficient time to each topic based on its importance and your level of understanding. Break down your study material into manageable chunks and set realistic goals to stay motivated.
• Collaborate with peers: Consider forming study groups with classmates or friends who are also preparing for the exams. Discussing and explaining concepts to each other can enhance your understanding and retention of the material.
• Utilize available resources: Take advantage of textbooks, reference materials, online resources, and educational platforms that provide study materials, practice questions, and tutorials specific to your exam. These resources can provide valuable insights and additional practice opportunities. CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.
• Practice time management: During the exam, time management is crucial. Practice solving questions within the allocated time limits to improve your speed and accuracy. This will ensure that you can complete the exam within the given time frame.
• Stay focused and maintain a healthy lifestyle: Avoid distractions and create a conducive study environment. Take regular breaks, exercise, eat nutritious meals, and get enough sleep to keep your mind and body in optimal condition for studying.

Remember, success in any exam is a result of consistent effort, effective preparation, and a positive mindset. Good luck with your exams!

WAEC Chemistry Questions and Answers 2022:

Furthermore, the questions below are the WAEC Chemistry Questions. Going through them will make you ready to score high in your WAEC 2021 Chemistry Examination. Congratulations.

• How many alkoxy alkanes can be obtained from the molecular formula C4 H4O4

ANSWER: C (3)

• Element Y has two isotopes Y and Y present in the ratio 1:3. The relative atomic mass of Y would be

ANSWER: C (21.5)

• What condition favors the formation of the product for the endothermic reaction, N2O4(g) —><—– 2NO2(g)

A. Decrease in pressure

B. A decrease in volume

C. An increase in pressure

D. A constant volume

ANSWER: A ( Decrease in pressure)

• Elements X and Y have electronic configurations 1S22S22P4 and 1S22S22P63S23P1 respectively. When they combine the formula of the compound formed is

ANSWER: B (Y2X3)

CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM

• A solution of 0.20 mole of NaBr and 0.20 mole of MgBr2 in 2.0 dm3 of water is to be analyzed. How many moles of Pb(NO3 )2 must be added to precipitate all the bromide as insoluble PbBr2

A. 0.30 mol

B. 0.10 mol

C. 0.20 mol

D. 0.40 mol

ANSWER: A (0.30 mol)

• Na2CO3 + HCl —-> NaHCO3 + NaCl. The indicator most suitable for this reaction should have pH equal to.

ANSWER: D (9)

• A saturated solution of silver trioxocarbonate (IV), was found to have a concentration of 1.30 x 10-5 moldm-3 . The solubility product of the trioxocarbonate (IV) is

A. 8.79 x 10-15

B. 1.69 x 10-10

C. 1.82 x 10-11

D. 9.84 x 10-10

ANSWER: A (8.79 x 10-15)

QUESTIONS & ANSWERS FOR THE 2022/2023 WAEC EXAM

• 100.0g of KClO3 was added to 40.0 cm^3 of water to give a saturated solution at 298K. If the solubility of the salt is 20.0 moldm^-3 at 298K, what percentage of the salt is left undissolved? {K= 39, Cl = 35.5, O = 16}
• Tetraoxosulphate (VI) ions are the final test using

A. acidified silver nitrate

B. acidic barium chloride

C. lime water

D. dilute hydrochloric acid

ANSWER: D (dilute hydrochloric acid)

• When platinum electrodes are used during the electrolysis of copper (II) tetraoxosulphate (IV) solution, the solution gets progressive

D. Atmospheric

ANSWER: A (Acidic)

WAEC 2022/2023 Chemistry Theory Questions

PAPER 2 (ESSAY) SECTION A

• (a) When calcium oxide and coke are heated in an electric furnace, the products are carbon (ii) oxide and calcium carbide (CaC2), write the equation for this reaction.

(b) The addition of water to calcium carbide leads to the formation of calcium hydroxide and ethyne. Write the equation for the production of ethyne.

• Calculate the percentage by mass of silicon tetrachloride. [2 marks]
• Ammonia, NH3, and phosphine, Ph3, are the hydrides of the first two elements in group 5. (a) Draw a dot and cross diagram for the ammonia molecule. [2 marks] (b) Sketch and explain the shape of the ammonia molecule. [3 marks]
• The first ionization energy of chlorine is +1260KJmol-1. (a) Define the term first ionization energy. (b) State and explain the general trend in the values of the first ionization energy for the elements across the period, sodium to argon in the periodic table.
• Compound A consists of carbon and hydrogen only. The compound was found to contain 80% carbon by mass. (a) Calculate the empirical formula of compound A using the data above. (b) The relative molecular mass of compound A was found to be 30. Use this information to deduce the molecular formula of compound A. [H = 1.00 C = 12.00]
• State two factors other than a change in temperature or the use of a catalyst that influence the rate of a chemical reaction.
• Identify the solid remaining when each of the following is heated. (a) lithium trioxonitrate (V) (b) potassium trioxonitrate (V) (c) calcium trioxonitrate (V)

CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For the 2022/2023 WAEC EXAM

• An aqueous solution has a pH of 4.0. (a) (i) What is the hydrogen ion concentration of the solution? (ii) What effect will it have on litmus paper? (iii) Which of the following salt solutions would have the same effect on litmus? Give a reason for your answer. NH4Cl(aq); NaCl(aq) ; CH3OON(aq). (b) (i) Differentiate between a fine chemical and a heavy chemical. (ii) Name two sources of air pollution. (iii) Suggest one way of reducing air pollution in cities
• (a) (i) Explain briefly the fermentation process. (ii) Write a balanced equation for the fermentation of glucose. (iii) What substance must be added to glucose solution to ferment it? (iv) Explain briefly why tightly corked glass filled to the brim with palm wine shatters on standing. (b) State one industrial application of each of the following methods of separation: (i) Crystallization; (ii) Fractional distillation. (c) Explain the following terms: (i) Saponification; (ii) Esterification. (d) Write a balanced equation to illustrate each of the terms in (c). (e) i) What is hydrocarbon compound? (ii) Name two principal sources of hydrocarbons.

QUESTIONS & ANSWERS FOR 2022/2023 WAEC EXAM

• (a) Two elements represented by the letters Q and R have atomic numbers 9 and 12 respectively. (i) Write the electron configuration of R. (ii) To what group does Q belong in the periodic table? (iii) Write the formula of the compound formed when Q combines with R. (iv) Explain briefly, why Q is a good oxidizing agent. (v) State whether R would be expected to form acidic or basic oxide. (b) (i) State two assumptions of the kinetic theory of gases. (ii) When some solids are heated, they change directly into the gaseous state. What name is given to this phenomenon? (iii) List two substances that exhibit the phenomenon mentioned in (ii). (iv) Write an expression to show the mathematical relationship between the rate of diffusion of a gas and its vapor.

READ ALSO FOR CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.

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In conclusion, mastering the Chemistry theory and objectives is crucial for success in the upcoming 2022/2023 WAEC exam. By diligently studying and understanding the key concepts, practicing with a wide range of questions, and seeking clarification when needed, students can enhance their understanding of this fascinating subject. Remember, a strong foundation in Chemistry will not only boost your performance in the exam but also equip you with valuable knowledge for future academic pursuits. Stay focused, stay determined, and embark on this journey with confidence. Best of luck in your preparations and may you excel in the upcoming WAEC exam! CHEMISTRY THEORY And OBJECTIVE: QUESTIONS & ANSWERS For 2022/2023 WAEC EXAM.

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JEE Advanced 2024 Question Paper With Answer Key - PDF Download

JEE Advanced Question Paper 2024

Many of the coaching institutes have released the JEE Advanced 2024 question paper PDF on May 26 after the exam. The question paper of JEE Advanced 2024 along with answers has been updated on our page. JEE Advanced exam question paper 2024 contains questions from the subjects Physics, Chemistry and Mathematics.

JEE Advanced Previous Year Question Paper

Jee main previous year question paper, jee advanced 2024 marking scheme.

Following is the marking scheme of JEE Advanced 2024. You can understand the basic guidelines and rules to plan out your study preparations.

JEE Advanced Marking Scheme 2024

Jee advanced 2024 important topics.

Candidates can check the subject-wise important topics for JEE Advanced 2024 exam in the table below:

JEE Advanced 2024 important dates to Note after the exam

Jee advanced 2024 exam pattern.

There are four sections in the JEE Advanced paper 2024, below is the marking scheme and paper pattern for every section.

Sec-I (Max. marks-12)

Sec-II (Max. Marks-12)

Sec-III (Max. marks-24)

Sec-IV (Max. marks-12)

Section 1 had Four Questions with four options in which only ONE option was right.

Marking scheme in this section:

Full marks: +3 If only the correct option is chosen

Zero Marks:: 0 If none of the options are chosen

Negative Marks: -1 In all other cases

Section 2 had 3 questions with four options in which ONE OR MORE THAN ONE option(s) were correct.

Full marks: +4 If only (all) the correct options are chosen

Partial Marks: +3 If all the four options are correct but ONLY three correct options are chosen

Partial Marks: +2 If three or more options are correct but only two correct options are chosen

Partial Marks: +1 If two or more options are correct but only one correct option is chosen

Zero Marks: 0 If none of the options are chosen

Negative Marks: -2 In all other cases

Section 3rd had 6 questions of Numerical Based (Non-Negative Integer Type)

Full marks: +4 for the correct answer

Zero Marks: 0 in all other cases

Section 4 had (04) questions with each question of Match List type i.e. Match List-I to List-II. List-I had 4 questions to be matched to List-II which had 5 options. One or more than one option was correct.

Full marks: +3 in case all options are correct,

Zero Marks: 0 if none of the options are chosen

How to Download JEE Advanced 2024 Question Paper with Solutions 

For downloading the JEE Advanced 2024 answer key candidates can go through the given below process:

Go to the table below

Then choose your Subject( Physics, Chemistry and Biology)

Just click on “PDF Download”

Then you will get your JEE advanced 2024 question paper with solutions pdf

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8 major changes 'Lessons in Chemistry' has made from the bestselling book (so far)

Posted: October 13, 2023 | Last updated: October 13, 2023

• Apple TV+'s "Lessons in Chemistry" is based on Bonnie Garmus' 2022 novel of the same name.
• We rounded up the biggest differences between the adaptation and the bestselling book.
• Warning: This article contains major spoilers for the book and episodes that have aired so far.

The new Apple TV+ show "Lessons in Chemistry" remains in many ways faithful to Bonnie Garmus' bestselling book of the same name.

Both the series and the book tell the story of the uncompromising and unconventional Elizabeth Zott (Brie Larson), a scientist on the verge of a major breakthrough in DNA research whose life trajectory changes after she meets and falls in love with one of her research institute's top scientists, Calvin Evans (Lewis Pullman).

Elizabeth's relationship with and support from Calvin brings her closer than ever to making a splash in the science community, but after an unforeseen change in circumstances, she finds herself ousted from her position at the lab and reluctantly accepts a job as a host on a cooking program.

Making the most of the opportunity, Elizabeth decides to teach her audience of housewives and mothers the chemistry of cooking, empowering them to go beyond society's expectations of them, sparking a revolution.

Not every detail from the show has been included in the book and some aspects, characters, and storylines from the show have been altered, condensed, or replaced with others.

Here are the biggest differences between the book and the episodes of the show that have aired so far.

The way Elizabeth Zott and Calvin Evans first meet has been slightly altered.

In the book, Elizabeth brazenly enters Calvin's lab at Hastings Research Institute one day in search of some equipment for her own undersupplied lab. 

During their terse exchange, Calvin insults Elizabeth by assuming that she is a secretary, leading to her marching out with a box of beakers. Several days later, Calvin finds her and apologizes but Elizabeth shows no interest in making amends.

This is slightly altered for the show which shows Elizabeth working on her abiogenesis research after work hours. She sneaks into Calvin's locked lab and swipes a bottle of ribose from his shelves. 

The next day she finds herself confronted by Calvin, who mistakenly assumes she's a secretary and accuses her of stealing the bottle to sell on the black market. He even calls her a "fibber" when Elizabeth tells her she's a chemist, just like him. It's only when Calvin puts in a formal complaint about Elizabeth to Miss Frask (Stephanie Koenig), that he realizes she isn't lying.

The Little Miss Hastings pageant is entirely made up for the adaptation.

In the book, there is no mention of the Little Miss Hastings pageant, which Elizabeth is begrudgingly forced to participate in as "Miss Aminos" after she receives a formal warning about her behavior.

It's while grabbing her coat and making an early exit that Elizabeth encounters Calvin again, who at that very moment vomits on her.

In the book, this second meeting between Calvin and Elizabeth takes place at a theater following an opera performance the two both happen to be at, and it's Calvin's reaction to a date's perfume, rather than Mrs Donatti's that makes him nauseous.

Rather than be a serendipitous encounter as it is in the book, in the show Calvin reveals that he had actually attended the pageant to see Elizabeth and gift her the bottle of ribose as an apology for his rude remarks.

Harriet Sloane, Calvin's neighbor, plays a much larger role in the show.

The first episode introduces viewers to Harriet Sloane (Aja Naomi King), who doesn't appear until much later on in the book. Calvin's neighbor doesn't come into the story until after Elizabeth has moved in with Calvin. In fact, readers do not see Calvin interact with her at all.

But in the show, Harriet is shown to be a part of Calvin's daily life — in fact, it's shown that he even babysits her children sometimes. 

Her role in the series has been expanded to introduce a new storyline about the neighborhood where she and Calvin live being under threat of being demolished to make way for a new freeway.

Elizabeth is sexually assaulted by someone she considers a friend and a mentor, rather than an old and lecherous professor.

The second episode of "Lessons in Chemistry" opens with a flashback to Elizabeth's days studying at the University of California, Los Angeles (UCLA), and audiences learn the reason why she never managed to get her PhD. 

Shortly after submitting her proposal, she finds herself on the receiving end of unwanted sexual advances from her professor and personal mentor, Dr. Bates, a character who has been invented for the show. When she tells him she doesn't see him that way, he forces himself on her.

However, in the book, it is the older, lecherous Dr. Meyers who rapes Elizabeth in a brutal attack after finding her running last-minute tests on his latest research project late at night in the university lab.

In both the book and the adaptation, Elizabeth is able to stop her assailant by stabbing them in the gut with a pencil but pays the consequence of losing her place on her course when she refuses to offer a statement of regret.

This change to the story plays a role in Elizabeth's decision to distance herself from Calvin when she realizes that there is more than friendship between them.

Shortly after she is transferred to Calvin's lab so she can focus on her abiogenesis research, Elizabeth requests to be moved back after an exchange with Calvin brings up memories of her attack.

When she isn't allowed to, she decides to set up boundaries in their shared lab and begins acting coldly towards him.

None of this occurs in the book, but it helps underscore Elizabeth's apprehensive about growing close to Calvin, in case he turns out to be like other men she has encountered, or it jeopardizes her position at Hastings.

Six-Thirty appears earlier in the story in the show, and there's a different reason why he has his unique name.

In the second episode, Elizabeth finds a stray dog sniffing around the trash cans in her backyard, and taking pity on him, makes him a plate of fresh food. Later on, it's made clear that she's adopted him when she brings him to Calvin's house. 

When asked what his name is, Elizabeth says it's Six-Thirty "after the time he wakes me up in the morning. It's like clockwork."

In the book, Six-Thirty shows up in the story after Elizabeth and Calvin have begun living together and agree to get a dog.

He follows Elizabeth home from a nearby deli and gets his humorous name after Calvin asks Elizabeth who her friend is and, mishearing him, Elizabeth looks at her watch and reads him out the time.

Six-Thirty is depicted as a Goldendoodle, a breed that wasn't actually around in the 1950s.

In the book, Six-Thirty is described as "tall, gray, thin, and covered in barbed-wire-like fur," which brings to mind a dog like a Lurcher.

However, in the adaptation the failed bomb detection dog is shown to be a  Goldendoodle  — a cross a Golden Retriever and a Poodle that  didn't come about until the 1990s .

The show's version of Calvin accepts that Elizabeth doesn't want to get married without question.

At the end of the second episode, Elizabeth lays out the reasons why she never wants to get married or become a mother: for her, it would mean giving up everything else.

Calvin thanks her for letting him know and reassures her that "as long as I have you and you're happy that is enough for me."

These events unfold very differently in the book; even though Elizabeth has made her feelings about marriage clear, Calvin still tries to propose to her with a ring over lunch one day at Hastings.

He also has a hard time understanding why she's so opposed to not only marrying him but changing her last name to his and reveals that he has already added the name "Elizabeth Evans" to the deed of their home.

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