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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.

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

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Question 1 of 10 50 total questions
Question 21
jamb 2016
The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is
A6.2
B6.8
C7.1
D6.9
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Question 22
jamb 2016
The industrial preparation of hydrogen gas from water gas is referred to as
ABosch process
BContact process
CHaber process
DBayer Process
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Question 23
jamb 2016
The ability of carbon to form long chains is referred to as
AAlkylation
BAcylation
CCarbonation
DCatenation
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Question 24
jamb 2016
Ammonium chloride can be separated from its mixture with common salt by
ADistillation
BEvaporation
CDecantation
DSublimation
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Question 25
jamb 2016
The principle of column chromatography is based on th ability of the constituents to
AReact with the solvent in the column
BReact with each other in the solvent in the column
CDissolve in each other in the column
DMove at different speeds in the column
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Question 26
jamb 2016
The monomer of nylon is
AHydroxybenzene
BHexanedioic acid
CBenzene -1,-4-dicarboxylic acid
DEthane-1,2-diol
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Question 27
jamb 2016
In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through
AConcentrated tetraoxosulphate (VI) acid
BAnhydrous calcium chloride
CCalcium oxide
DSodium hydroxide
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Question 28
jamb 2016
The enzyme used in the hydrolysis of starch to dextrin and maltose is
AZymase
BSucrase
CAmylase
DLactase
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Question 29
jamb 2016

The condition required for corrosion to take place is the presence of

AOxygen and Carbon (IV) oxide
BWater and Oxygen
CWater and Carbon (IV) oxide and Oxygen
DWater and Carbon (IV) oxide
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Question 30
jamb 2016
In an electrochemical cell, polarization is caused by
AOxygen
BHydrogen
CTetraoxosulphate(IV) acid
DChlorine
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