Download JAMB Past Questions and Answers on Chemistry PDF for 2023/2024 UTME. JAMB past questions cover the following JAMB subjects’ English language, Mathematics Physics, Biology, Government and Economics etc.
JAMB Chemistry questions are easy to pass if one can pay close attention to some important topics in chemistry. There are topics in UTME chemistry syllabus that are repeatedly seen in JAMB questions.
In this page I will list those topics that every candidate writing JAMB UTME chemistry should pay close attention.
Expected Topics in JAMB Chemistry
- Separating techniques
- How to determine empirical formula
- Balancing of equation
- Acid, Base, and Salt (Physical and Chemical properties, Neutralization rxn)
- PH Scale
- Electronic configuration
- Gas Law
- Redox reaction
- Rate of chemical reaction (Le Chatelier’s principle)
- Carbon and its compound
- Hydrogen and its compound
- Nitrogen and its compound
- Sulphur and its compound
- Aromatic and Aliphatic Hydrocarbon (Alkane, Alkene, Akyne, Benzene)
- Hardness of water
The above topics are grouped under organic, physical, and industrial chemistry.
Many students believe that chemistry is volatile and that is reason you need to adequately prepare to be able to score above 70 in it.
It is important that you know the chemical properties, physical properties, and laboratory preparation of no 11 – 14. Also naming of hydrocarbon and their differences and balancing of redox reaction are equally important. I have discovered that candidates who pay close attention to these areas in chemistry always perform well in the exam.
However, the way JAMB repeat questions is a little bit tricky, and sometimes they do it directly. All candidates who are writing UTME must know that JAMB secret lie in mastering past questions.
I do tell my students that one of the ways to unfold JAMB secret is to get like 7-12 years past questions. You have to study the trend and pattern of the questions, its occurrences, and then extract areas/topics JAMB likes bringing out in each subject you are writing.
The above approach is what I referred to as a strategic reading pattern. I will give some examples of how JAMB repeats questions in the case below.
Examples of JAMB repeated questions and Answers on Chemistry
(1) An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formula.
[C = 12, H = 1, O = 16]
Answer – D
(2) The reaction between ammonia and ethyl ethanoate produces
(A) ethanol and propanamide
(B) ethanol and ethanamide
(C) propanol and ethanamide
(D) propanol and propanamide.
Answer – B
(3) 2-methylbutan-2-ol is an example of a
(A) secondary alkanol
(B) tertiary alkanol
(C) dihydric alkanol
(D) primary alkanol
Answer – B
(4) Chlorophyll obtained from green leaves of plant can be composed of more than one coloured component by the technique of
Answer – C
(5) The colour of the fountain water is
A. blue B. orange C. red D. yellow.
Answer – C
(6) Permanent hardness of water can be removed by
(B) adding slaked lime
(C) adding caustic soda
Answer – B
(7) A solution which on treatment with hydrochloric acid produces a colourless, odourless gas which turns lime water milky is most likely to be a
Answer – A
(8) If chlorine is bubbled into water and the resulting yellowish-green solution is exposed to bright sunlight for a while, the solution will decompose giving out
(A) oxygen, thereby producing hypochlorous
(B) chlorine and oxygen
(C) oxygen and leaving behind aqueous hydrochloric acid
(D) oxygen, hydrogen and chlorine
Answer – C
(9) H3PO4(aq)+ H2O(l) → H2PO4–(aq) + H3O+(aq)
∆H = –13kJ at 298K
In the reaction above, an increase in temperature would
(A) have no effect on the reaction
(B) slow down the reverse reaction
(C) favour the forward reaction
(D)favour the reverse reaction
Answer – D
(10) Sulphur (IV) oxide bleaches by
(A) hydration (B) reduction (C) absorption (D) oxidation
Answer – B
(11) Which of the following gases can be collected by the method of downward delivery?
(A) Oxygen (B) Hydrogen (C) Chlorine (D) Ammonia.
Answer – C
(12) Milikan’s contribution to the development of atomic theory is the
(A) charge on electron (B) positive rays (C) charge to mass ratio (D) cathode rays
Answer – A
(13) What current in amperes will deposit 2.7g of alluminium in 2 hours? (A) 32 (B) 8 (C) 4 (D) 16
Answer – C
(14) Ethanoic acid is
(A) tribasic (B) unionizeable (C) monobasic (D) dibasic
Answer – C
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Top Secrets On How To Score High in JAMB CBT 2023
Do you want to pass JAMB successfully? Then this article will reveal secret to pass JAMB successfully. JAMB CBT is the newest way Joint Admission and Matriculation Board (JAMB) adopted to test her candidates.
And one of the successes JAMB has made in the past few years is moving from paper based test to computer based test (CBT).
This new process has helped in reducing malpractice, saving time and cost-effective means of making UTME a fair playing ground for all candidates. In the time past, the rate of malpractice was high but this has reduced via the introduction of CBT.
However, many students haven’t been able to integrate well with JAMB CBT and this has led to failure or underperformance of many students. For any student to pass JAMB successfully, he/she must master the act of taking CBT which is quite different from paper based test. Mastering this act will enable you to pass JAMB successfully.
In this article, the top secrets on how to score high in JAMB CBT is discussed. And this will enable any candidate that reads it to know JAMB secret, how to study for JAMB, and how to pass JAMB successfully.
JAMB CBT Guide
- When you login you will see your picture and Name at the right hand side of the login. Make sure your Name and Picture are correct, If not inform the invigilators. You should also the the four subjects you have registered for, if there is a mistake call the attention of the invigilators.
- You can skip question and come back to answer them later
- The timer shows you the number of time left to answer the current subject
How to pass JAMB successfully or JAMB Secret
Here are the steps and how to pass JAMB CBT successfully:
(1) Study well before you write UTME
For JAMB CBT exams, Past questions are a must have, firstly, it serves as a means of making the students familiar with the way questions are being set and it properly conditions your mind on what to look out for when you are reading. Secondly, most times, past questions are reset in subsequent years, so it’s sort of a ‘legal expo’ since you have seen the questions prior to the exam.
Another thing is frequent study, once you keep your brain afresh by going through your notes and textbooks as a way of revising; you tend to remember things more
For the Use of English, build your diction and vocabulary as it will help you in the synonyms and antonyms section. How can you build your vocabulary? When you go through the past questions, have a dictionary, a book and a pen beside you. This will enable you check up a complex word, understand it’s context usage, and by writing it down, you won’t forget easily.
Some students do think about how to study for JAMB. The suggestion above has answered the question of how to study for JAMB. Past questions are guidelines that will navigate you through the way JAMB use to set their questions and those areas that do occur the most. I will advise that you pay attention to areas where JAMB like bringing out questions and you will see yourself scoring high. In addition, for students that will be writing Mathematics, pay close attention to differentiation, integration, binomial expansion, sequence, word problem, permutation and combination, probability, circle geometry, etc.
(2) Relax and be calm
Don’t allow the fear of the exam to get hold of you when you get into the testing hall. Fear may make you forget all you have read and eventually throw you off balance. Taking a deep breathe will help you dissipate the negative emotion.
(3) Build a Time Budget
At any given point during an exam, you should know the maximum number of minutes you have to spend on the current question before moving on to the next. This will definitely help you to pass JAMB.
Try to lay down very strict time limits for yourself on each question.” This strategy goes a long way toward avoiding time trouble; it keeps your attention focused and prevents you from spending too much time on any particular question. The key to maintaining this keen awareness is to build a time budget. First, take the time allotted for the exam and subtract ten minutes. Next, divide this amount by the number of questions. The result is how long you have to spend on each prompt. This provides a safety buffer. You want a few extra minutes available here and there to be able to double check your answers when you are finished.
Hint: Building a time budget will enhance your speed and accuracy. Don’t dwell too much on a question, there is no penalty if you guess and move on (No negative marking).
(4) Proceed from Easy to Hard
The most effective way to tackle an exam is to answer the easiest questions first, and this is exactly what you should do. Start with the most approachable questions before moving on to the difficult ones. Don’t worry if this has you skipping around all over the exam—in most cases the provided order is irrelevant.
It is also important to note that there is no particular order when writing JAMB CBT. You can start with any subject you find easy before you proceed to difficult ones.
Hint: For the science students, especially those doing calculation subjects like Mathematics, Physics and Chemistry, formulas are keys to solving any calculation. Once you see a question involving calculations, first bring out all the parameters given, then try to analyze the topic this question came from, after this you find out how the parameters are related, this is where the use of formulas comes in. By doing this chances of getting the right answer are higher
(5) God factor
This can’t be overemphasized. He is the only person that can dot your I’s and cross your T’s. And also silence other unforeseen factors that are beyond your power. Commit your study each day into His hands and ask Him for the grace to read, understand and retain.