Get ready for 2025/2026 UTME with our JAMB Chemistry questions and answers PDF. Discover frequently repeated questions, study tips and essential strategies to ace your exam.
Are you preparing for the 2025/2026 UTME and in need of JAMB Chemistry questions and answers? Look no further. This guide provides you with frequently repeated questions from previous JAMB Chemistry exams and expert study strategies to help you achieve your desired score.
As the 2025 UTME approaches, proper preparation is essential for success. By focusing on the key topics in Chemistry, you can boost your chances of performing well in the exam. While the Chemistry section can seem challenging, with the right approach, you can overcome any obstacles and tackle the exam with confidence.
The official 2025 JAMB Chemistry questions and answers will be posted on this page a day before the exam date. Remember, JAMB strictly prohibits the use of any Chemistry-related study materials during the exam. Therefore, it’s vital to study these questions ahead of time to boost your chances of acing the exam.
Stay Tuned for 2025 JAMB Chemistry Questions and Answers
Be sure to check back regularly as we will upload the Chemistry questions and answers here right before the UTME. While waiting, let’s explore some of the most frequently repeated Chemistry questions from previous exams, as these are likely to appear in the 2025 UTME.
JAMB Chemistry Frequently Repeated Questions You Need to Know
Below are a few of the most frequently asked Chemistry questions in past JAMB exams. Make sure you study them carefully, as they could appear in your 2025 UTME.
(1) An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formula.
(A) C6H13O2
(B) C4H9O
(C) C5H12O
(D) C3H8O
[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
(A) crystallization
(B) hydrolysis
(C) chromatography
(D) sublimation
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
(A) filtration
(B) adding slaked lime
(C) adding caustic soda
(D) boiling.
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
(A) trioxocarbonate(IV)
(B) trioxonitrate(V)
(C) hydroxide
(D) chloride
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
determination of
(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
Related Articles: JAMB Repeated Questions for all Subjects 2025
Keep checking this page for the latest JAMB Chemistry questions and answers for the 2025 UTME. We will update the post regularly to help you stay on track with your preparations.