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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.

2,505 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

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Question 1 of 5 2,505 total questions
Question 1251
jamb 1978

A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone?

Adistillation
Bsublimation
Cprecipitation
Devaporation
Edecomposition
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Question 1252
jamb 1978

In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5M sodium hydroxide would exactly neutralise 10cm\(^3\) of 1.25M sulphuric acid?

A5cm3
B10cm3
C20cm3
D25cm3
E50cm3
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Question 1253
jamb 1978

The periodic classification of elements is an arrangement of the elements in order of their

AAtomic Weights
BIsotopic Weights
CMolecular Weights
DAtomic Numbers
EAtomic Masses
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Question 1254
jamb 1978

When sodium chloride and metallic sodium are each dissolved in water

Aboth processes are exothermic
Bboth processes are endothermic
Cthe dissolution of metallic sodium is endothermic
Dthe dissolution of metallic sodium is exothermic
Ethe dissolution of sodium chloride is explosive
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Question 1255
jamb 1978

Zinc Oxide is a?

ABasic Oxide
BAcidic Oxide
CAmphoteric Oxide
DNeutral Oxide
EReactive Oxide
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