Chemistry Past Questions and Answers pdf

English Past Question 2021

Chemistry Past Questions and Answers pdf – “Dive into the world of chemical wonders and academic triumph with our Chemistry Past Questions and Answers PDF! If you’re a student, a passionate learner, or someone preparing for a chemistry-related examination, this resource is your key to mastering the captivating realm of chemistry.

Our Chemistry Past Questions and Answers PDF is your comprehensive roadmap to success. It’s not just a collection of questions; it’s a dynamic tool designed to empower you with the knowledge, skills, and confidence to conquer any chemistry challenge.

Inside this PDF, you’ll find a treasure trove of questions, ranging from fundamental concepts to advanced topics. Whether you’re preparing for an exam, enhancing your chemistry skills, or exploring the mysteries of the chemical world, our PDF offers a structured and engaging learning experience.

What sets us apart? Our detailed answers and explanations provide valuable insights, helping you understand the ‘whys’ behind each question. It’s not just about getting the correct answer; it’s about gaining a deep comprehension of chemistry.

Unleash your inner chemist and embark on a transformative journey with Chemistry Past Questions and Answers PDF. Your chemistry success story begins here!”

Chemistry Past Questions and Answers pdf

Why you need Chemistry Past Questions and Answers pdf

Not only will this past question expose you to the questions that have been asked years back as most of those questions get repeated every year, but it will also show you what to expect as you are preparing for the exams and the correct answer to give when you are asked such question.

The exam questions will not be new to you because the past questions and answers that we offer comprise a list of questions asked previously during the exams, and some will just be rephrased. So if you don’t have a copy of this last question, then you are losing out. It also provides useful information about the types of questions to expect. You will find out the number of questions you will see in the examination.

1. It enlightens you on the scope of the exam. Hence, you won’t be in the dark about questions to expect in the examination. In like manner, you won’t develop examination fever as a result of not knowing where the questions will be coming from.

2. It equips you beforehand.

3. It guides you on how to answer exam technical questions.

Chemistry Past Questions and Answers pdf Pattern

This past question follows the original pattern of Chemistry Past Questions and Answers pdf which is the multi-choice and theory. The multichoice section has the question with suggested answers from A-D, you are expected to choose the most appropriate answer for each question. This is where the past question comes in. We have carefully compiled the questions and provided the correct answers to them to make it easier for the users.

Sample Chemistry Past Questions and Answers pdf

SECTION A: MULTIPLE CHOICE questions answer all questions in this section. Use the OMR answer sheet provided to answer the questions.
 Follow the instructions on the OMR sheet.

Answer FOUR questions; ONE question from each course. Ensure you read and follow all the Instructions on the cover page of the Answer Booklet.


1. The reproducibility or repeatability of measurement is termed. Accuracy
B. Precision. Range
D. Confidence Interval

2. The alpha (α-) scattering experiment is synonymous with. J. J. Thomson. Ernest Rutherford
C. James Chadwick
D. Henry Mosley

3. According to Brønsted-Lowry, an acid is a\an
A. proton acceptor.
B. proton donor.
C. electron acceptor.
D. electron donor.

4. Isotopes of hydrogen differ from one another in. atomic number.
B. number of protons.
C. number of electrons.
D. number of neutrons.

5. A solution of known concentration is termed a
A. standard solution.
B. unsaturated solution.
C. saturated solution.
D. supersaturated solution.

6. Which of the following is the reason why CCl4 is non-polar?
 A. The polar bonds cancel each other.
 B. The molecule is non-linear.
 C. The molecule is covalent.
D. The small electronegativity difference between C and Cl.

Answer FOUR Questions in all; ONE from each course 001: GENERAL CHEMISTRY
1 (a) Distinguish between ionization energy and electron affinity giving an example in each. [2 marks]
(b) Briefly describe and give reasons for the observed trends of the following atomic properties in the periodic table (i) Atomic size (ii) Ionization energy (iii) Electron
affinity. [3 marks]
(c) Balance the following oxidation-reduction reactions, which occur in an acidic solution,
 using the half-reaction method:
 Cr2O72-(aq) + Cl (aq) Cr3+ (aq) + Cl2(g) [3 marks]
(d) Assign oxidation number to each atom in the following reaction and hence identify the oxidizing agent and reducing agent in each reaction.
(i) 2Al(s) + 3H2SO4 (aq) Al2(SO4)3(aq) + 3H2(g)
(ii) PbO (s) + CO (g) Pb(s) + CO2 (g) [2 marks]
[Total = 10 marks]

2. (a) A compound X is known to contain carbon, hydrogen, and oxygen only. When it is burnt completely in excess oxygen, carbon dioxide, and water are given out as the only products. It is found that 0.46g of X gives 0.88g of carbon dioxide and 0.54g of water.
 Find the empirical formula of compound X (R.A. M: H=1.0, C=12.0, O=16.0) [4 marks]

(b) (i) Differentiate between extensive and intensive property
(ii) Give one example each of extensive and intensive property [2 marks]

(c) (i) State one information that each of the three (3) quantum numbers n, l, and m give about the atomic orbital
(ii) Identify the orbitals described by the following quantum numbers and arrange them in order of increasing energy.
n = 4 l = 0 m = 0
n = 3 l = 2 m = – 1
n = 4 l = 2 m = 2
n = 3 l = 1 m = 0


3. (a) (i) Write the van der Waals equation and state all the parameters. [2 marks]
(ii) If sulfur (iv) oxide were an ideal gas, the pressure at 0.0 °C exerted by 1.0 mole occupying 22.4 L would be 1.0 atm (22.4 L is the molar volume of an ideal gas at
(STP). Use the Van der Waals equation to estimate the pressure of this volume of 1.0 mol. 𝑆𝑂2 at 0.0 °C. (Take 𝑎 = 6.865 𝐿2. 𝑎𝑡𝑚/𝑚𝑜𝑙2, b = 0.05679 L/mol.) [2 marks]

(b) Briefly account for the following observation, when a solution of sodium iodide and potassium nitrate are mixed, no visible reaction is observed, however when a solution of lead nitrate is substituted for potassium nitrate, a visible reaction is observed and a precipitate is formed. [2 marks]

(c) (i) Distinguish between natural and induced radioactivity.

(ii) The isotope 9038Sr is one of the extremely hazardous species in the fallout from a
nuclear fission explosion. A 0.600 g sample diminishes to 0.395 g in ten years.
 Calculate the half-life. [4 marks] [Total = 10 marks]

4. (a) (i) State the law of mass action.
 (ii) Using relevant illustrative reaction, distinguish between the reaction quotient (Q)
and the equilibrium constant (K).

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7 Tips to Prepare for Chemistry Exams

  1. Don’t make reading your hobby: A lot of people put reading as a hobby in their CV, they might be right because they have finished schooling. But “You” are still schooling, so reading should be a top priority and not a hobby. Read far and wide to enhance your level of aptitude
  2. Get Exams Preparation Materials: These involve textbooks, dictionaries, Babcock University Post UTME Past Questions and Answers, mock questions, and others. These materials will enhance your mastery of the scope of the exams you are expecting.
  3. Attend Extramural Classes: Register and attend extramural classes at your location. This class will help you refresh your memory and boost your classroom understanding and discoveries of new knowledge.
  4. Sleep when you feel like: When you are preparing for any exams, sleeping is very important because it helps in the consolidation of memory. Caution: Only sleep when you feel like it and don’t oversleep.
  5. Make sure you are healthy: Sickness can cause excessive feelings of tiredness and fatigue and will not allow you to concentrate on reading. If you are feeling as if you are not well, report to your parent, a nurse, or a doctor. Make sure you are well.
  6. Eat when you feel like it: During the exam preparation period, you are advised not to overeat, and to avoid sleep. You need to eat little and light food whenever you feel like eating. Eat more fruits, drink milk and glucose. This will help you to enhance retention.
  7. Reduce your time on social media: Some people live their entire lives on Facebook, Twitter, WhatsApp, Messenger chat. This is so bad and catastrophic if you are preparing for exams. Try and reduce your time spent on social media during this time. Maybe after the exams, you can go back and sleep in it.

If you like these tips, consider sharing them with your friends and relatives. Do you have a question or comments? Put it on the comment form below. We will be pleased to hear from you and help you score as high as

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