Chemistry Past Questions

Study and practice Chemistry past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.

109 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

109 questions
Question 1 of 9 109 total questions
Question 51
jamb 2025

The acid used in making baking soda and soft drink is

Atartaric acid
Bfatty acid
Cboric acid
Dcitric acid
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Question 52
jamb 2025

Calculate the pH of 0.001M  KOH solution.

A11
B14
C12
D3
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Question 53
jamb 2025

When ΔH is positive and small, and ΔS is positive and large, the reaction will be

ANon-spontaneous
Bfavour forward reaction only
Cfavour backward reaction only
Dspontaneous
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Question 54
jamb 2025

The property of metal that makes it suitable as a catalyst is

Afilled f-orbital
Bpartially filled d-orbitals
Cpartially filled f-orbital
Dfilled d-orbital
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Question 55
jamb 2025

The dusty and sand particles present in the air is an example of 

Aa suspension
Ba dispersion
Can emulsion
Da saturated solution
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Question 56
jamb 2025

An example of an alkaline gas is

AHCl
BN\(_2\)
CNH\(_3\)
DNO\(_2\)
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Question 57
jamb 2025

In the table above, the two compounds that will combine in the presence of an acid-catalyzed compound, V is

AI and IV
BIII and IV
CI and II
DII and III
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Question 58
jamb 2025

The composition of petroleum varies because it is a 

Ahydrocarbon
Bliquid
Cmixture
Dnatural resource
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Question 59
jamb 2025

The molecule with the highest number of lone pair of electrons is 

AH\(_2\)O
BNH\(_3\)
CCH\(_4\)
DC0\(_2\)
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