It’s time to bring you good news on WAEC Chemistry Questions and Answers. If your target is to have A1 in Chemistry, this page is for you. The latest Chemistry Objectives and theory Questions and Answers for WAEC this year has been taken care of here.
It’s obvious many might be searching for 2024 free WAEC Chemistry expo or runs on the Essay and objective sections. Such candidates are equally covered, as I have taken it upon myself to provide all the necessary updates on the Chemistry exams and PDF download.
In addition to the above mentioned opportunities, there is sampled WAEC Chemistry Past Questions and Answers for practice before the main exams. Do well to make good use of the likely WAEC expo/runz Chemistry Objectives and Essay updates provided hereunder.
Table of Contents
Free WAEC Chemistry Objectives Questions and Answers 2024
The following are Sample WAEC Chemistry Objectives Past Questions and Answers:
1. How many grammes of NaOH(s) would be needed to produce 100.0 cm3 of a 0.20 mol dm-3 NaOH, (aq)? [NaOH = 40.0]
- A. 800.0g
- B. 0.02 g
- C. 20.0 g
- D. 0.80 g
Answer: D (0.80 g)
2.How many moles of copper would be deposited by passing 1 Faraday of electricity through a CuCl2
solution?
- A. 2 moles
- B. 0.5moles
- C. 0.025moles
- D. 1 mole
Answer: B ( 0.5moles)
3. Which of the following gases has the lowest rate of diffusion?
[H=1.0, C=12.0, N = 14.0, O= 16.0]
- A. Nitrogen
- B. methane
- C. Ammonia
- D. Oxygen
Answer: D (Oxygen)
4. The best indicator to use for the titration of ethanoic acid with sodium hydroxide is
- A. methyl orange
- B. phenolphthalein
- C. screened methyl orange
- D. methyl red
Answer: B (phenolphthalein)
5. Thermal cracking of alkanes usually
- A. requires hydrogen
- B. produces only small alkanes
- C. involves decomposition
- D. is an exothermic process
Answer: C (involves decomposition)
6. Petrochemistry is an example of
- A. applied chemistry
- B. Biochemistry
- C. Pure chemistry
- D. Environmental chemistry
Answer: A (applied chemistry)
Essay Questions
Below are Chemistry WAEC Theory Past Questions and Answers:
a. What is a transition element?
b. Consider the electron configuration of the following elements: A=2, 8,6; B=2,8,2; C=2,8,1, D=2,8,8
State the element which forms a: i. doubly charged cation; ii. soluble trioxocarbonate (IV).
c. Explain briefly why there is a general increase in the first ionization energies of the elements across the period in the periodic table.
d. Give two examples of an aliphatic compound
e. Explain briefly why alkanols are stronger bases than water.
f. State the major raw materials used in the Solvay process
g. What is geometric isomerism?
h. Give a reason why water gas is a better fuel than producer gas.
i. Define the term heat of combustion.
ji. State Faraday’s second law of electrolysis
ii. Calculate the amount of silver deposited when 10920 coulombs of electricity is passed through a solution of a silver salt.
[IF = 96500 C mol-1]
How to Answer WAEC Chemistry Questions
The following steps are very important for candidates that wish to make good grades:
1. Read all the Instructions provided in the Question paper: This is a very important thing to do as soon as the Question paper is given to you. The essence of this is to help you know what you are required to do. Try as much as possible to adhere to the exams instructions.
2. Fill in Your details where required on the Answer booklets. One of the greatest mistakes candidates make is failure to write their details on the Answers booklet. Filling Your exams details before attempting questions is important because you may forget or may cut off with time.
3. Start with the Questions you know best: This is a smart approach. When you start answering the questions you know very well, you will not only have the confidence to answer the difficult ones but give the marker/examiner a good impression about your knowledge of the subject.
4. Read the Questions at least Thrice before providing solutions: Don not be in a haste to answer questions. Try and read them over and over again to gain full understanding of the questions.
5. Make your handwriting are readable: Take your time to write very well, a good handwriting will make your answers clear understandable.
6. Cross Check your work before submission: I’m all your doing, don’t fail go through your work before submitting your answer booklet. This will enable you to correct mistakes made.
Essay/Objectives WAEC Expo/Runs
It’s important to know that there’s nothing like WAEC Expo or Runs. Many platforms may be promising you Expo on WAEC Chemistry, you have to be wise in order not to be scammed.
All we do is to ensure that we provide you with all the necessary steps and updates on how to pass your exams without Stress. Stay tuned for more Related Updates.
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