WAEC Chemistry Questions And Answers 2020 To Expect - Premier Online Updates, Latest Tech Trends

WAEC Chemistry Expo 2022 – WAEC Chemistry Questions And Answers 2022 | Theory & OBJ

This article will show you the real Chemistry expo you need to pass WAEC Chemistry in 2022. I am going to show you the most repeated questions and answers you need.

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A lot of prospective candidates have been asking questions like, “how can I get WAEC expo in 2022 and receive Chemistry questions and answers before my exam?.

I am going to show you the truth behind the whole WAEC expo story in this article. No time to waste, let’s get started.

WAEC Expo On Chemistry 2022/2023 – How To Get OBJ & Theory Questions And Answers

1. The first thing you need to know is that you can totally pass WAEC examination without expo/runs. What you need is to work hard and study the right way. In fact, WAEC is not hard at all.

2. Here, we do NOT advertise WAEC expo to candidates and we will NEVER ask you to pay for WAEC expo for any reason.

3. I REPEAT, we do not engage in examination malpractice here and we will never ask you for money to get WAEC questions and answers in 2022.

4. Most people that promise to give you WAEC questions and answers for a fee are scammers. They are after your money.

5. If you get WAEC expo to pass in 2022, you will NEVER find expo for JAMB and Post UTME.

NOTE: You will get everything you need to pass your WAEC in 2022 here on this page, so keep reading.

Topics Where WAEC Chemistry Questions 2022 Will Come Out From

Physical Quantities
Separation Techniques
Atoms And Molecules
Physical and chemical changes
Electronic configuration
Periodic chemistry
Chemical bonding
Shapes of molecules
Stoichiometry
Gas laws
Energy changes
Acids, bases and salts
Solubility
Chemical kinematics and equilibrium
REDOX reactions
Electrolysis
Radioactivity
Organic chemistry
Qualitative analysis (metals and non-metals)

Likely Questions In WAEC Chemistry 2022/2023

1. Equilibrium is said to be attained in reversible reaction when

A. all the reactants have been used up
B. all the products have been formed
C. there is no further change in temperature
D. the rates of the forward and backward reactions are equal
E. the rate of formation of the products decreases with time

2. An acid present in proteins is

A. lactic acid
B. amino acid
C. propanoic acid
D. palmitic acid
E. stearic acid

3. The reaction represented by the equation NaOH_(aq) + HCI_(aq) → NaCI_(aq) + H₂O_(/)

A. is a double decomposition
B. is a neutralization
C. is reversible
D. is usually catalyzed
E. attains equilibrium after a few seconds

4. Which of the following compound is aromatic?

A. Benzene
B. Cyclobutane
C. Cyclopentane
D. Hexane
E. Ethene

5. Which of the following does not affect the rate of a chemical reaction?

A. Addition or presence of a catalyst
B. Size of the reacting particles
C. The enthalpy change for the reaction
D. Concentration of the reactants
E. Temperature at which the reaction is carried out

6. Given that 32.0g sulphur contains 6.02 x 10 ²³ sulphur atoms how many atoms are there in 2.70g of aluminium? {Al = 27, S =32}

A. 6.02 x 10 ²³
B. 3.01 x 10²²
C. 6.02 x 10²²
D. 5. 08 x 10²²
E. 3.01 x 10²²

7. A salt which loses mass when exposed to air is

A. hygroscopic
B. deliquescent
C. efflorescent
D. fluorescent
E. effervescent

8. Which of the following is used as an anaesthetic?

A. CHI₃
B. CHCI₃
C. CH₃OH
D. C₂H₅OH
E. CHBr₃

9. Which of the following is a neutral oxide?

A. Nitrogen (IV0 oxide
B. Carbon (IV) oxide
C. Sulphur (IV) oxide
D. Phosphorus (IV) oxide
E. Nitrogen oxide

10. The following are uses of radioactive isotopes except for

A. sterilization of medical equipment
B. tracing reaction paths
C. dating elements
D. radiography
E. determining equilibrium positions

11. The main characteristic feature of transition metals is that they

A. have the same atomic size
B. are reducing agents
C. from ions easily
D. have variable oxidation states
E. are highly electropositive

12. Bubbling of carbon (IV)oxide into calcium hydroxide solution results in the formation of

A. CaCO₃
B. CuCO₃
C. ZnCO,sub>3
D. Na₂CO₃
E. MgCO₃

13. Which of the following metals cannot extracted from its ore by using carbon (ll) oxide as the reducing agent?

A. Cu
B. Zn
C. Al
D. Pb
E. Fe

14. Aqueous sodium trioxocarbonate (IV) solution is alkaline because

A. acid from which it is formed is strong
B. sodium is an alkali metal
C. sodium trioxocarbonate (IV) is decomposed by water
D. sodium trioxocarbonate (lV) is stable to heat
E. sodium triocarbonate (IV) is hydrolysed in water

15. During the electrolysis of dilute tetraoxosulphate (VI) acid solution 0.05 mole of electrons were passed what volume of gas was produced at the anode? (Gaseous molar volume = 22. 4dm³ at s.t.p)

A. 0.224 dm³
B. 0.280 dm³
C. 0.560 dm³
D. 2.24 dm³
E. 22.4 dm³

If you can study your textbooks very well, use the WAEC syllabus and cover all topics you need to, you will definitely SMASH WAEC 2020 ONCE AND FOR ALL.

WAEC Chemistry Examination Scheme

There shall be three papers – Papers 1, 2 and 3 all of which must be taken. Paper 1 and 2 shall be a composite paper to be taken at one sitting.

PAPER 1: Will consist of fifty multiple choice objective questions drawn from Section A of the syllabus (ie the portion of the syllabus which is common to all candidates).

Candidates will be required to answer all the questions within 1 hour for 50 marks.

PAPER 2: Will be a 2-hour essay paper covering the entire syllabus and carrying 100 marks. The paper will be in two sections; Sections A and B.

Section A: Will consist of ten short structured questions drawn from the common portion of the syllabus. (i.e. Section A of the syllabus).
Candidates will be required to answer all the questions for 25 marks.

Section B: Will consist of two questions from the common portion of the syllabus (i.e. Section A of the syllabus) and two other questions from the section of the syllabus which is perculiar to the country of the candidate (i.e. either Section B or C of the syllabus). Candidates will be required to answer any three of the questions. Each question shall carry 25 marks.

PAPER 3: This shall be a 2-hour practical test for school candidates or 1 hour 30 minutes alternative to practical work test for private candidates. Each version of the paper shall contain three compulsory questions and carry 50 marks.

The questions shall be on the following aspects of the syllabus:
– One question on quantitative analysis;
– One question on qualitative analysis;
– The third question shall test candidates’ familiarity with the practical activities suggested in their teaching syllabuses.

WAEC 2022 Examination Instructions

Do not open your question paper until you are told to do so
USE HB pencil throughout in the OBJ Section
You are free to use Biro in the theory part
You are allowed to use calculator to solve
Make sure that you fill your name, Subject, paper, paper code and other examination details where necessary.
Ensure that the texts in your question papers are boldly printed
Behave yourself.
You must not be caught with any form of expo