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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.

84 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Question 1 of 4 84 total questions
Question 41
jamb 1991
In two separate experiments, 0.36g and 0.71g of chlorine combined with a metal X to give Y and Z respectively. An analysis showed that Y and Z contain 0.20g and 0.40g of X respectively. The data above represents the law of ?
Amultiple proportion
Bconservation of mass
Cconstant composition
Dreciprocal proportion
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Question 42
jamb 1991
An iron ore is known to contain 70.0% Fe2O3. The obtain from 80kg of the ore is?

(Fe = 56, O = 16)
A35.0 kg
B39.2 kg
C70.0 kg
D78.4 kg
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Question 43
jamb 1991
Which of the following are mixtures?
i, Petroleum
ii, Rubber latex
iii. Vulcanizer's solution
iv, Carbon (II)sulphide
Ai, ii and iii
Bi, ii and iv
Ci and ii only
Di and iv
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Question 44
jamb 1991
Which of the following can be obtained by fractional distillation?
ANitrogen from liquid air
BSodium chloride from sea water
CIodine from a solution of Iondine in carbon tetrachloride
DSulphur from a solution of sulphur incarbon disulphide
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