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Saturday, 04 April 2026
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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 1:
Which of the following can be obtained by fractional distillation?
  • A Nitrogen from liquid air
  • B Sodium chloride from sea water
  • C Iodine from a solution of Iondine in carbon tetrachloride
  • D Sulphur from a solution of sulphur incarbon disulphide
View Answer & Explanation
Question 2:
Which of the following can be obtained by fractional distillation?
  • A Nitrogen from liquid air
  • B Sodium chloride from sea water
  • C Iodine from a solution of Iondine in carbon tetrachloride
  • D Sulphur from a solution of sulphur incarbon disulphide
View Answer & Explanation
Question 3:
Which of the following are mixtures?
i, Petroleum
ii, Rubber latex
iii. Vulcanizer's solution
iv, Carbon (II)sulphide
  • A I, ii and iii
  • B I, ii and iv
  • C I and ii only
  • D I and iv
View Answer & Explanation
Question 4:
An iron ore is known to contain 70.0% Fe2O3. The obtain from 80kg of the ore is?
(Fe = 56, O = 16)
  • A 35.0 kg
  • B 39.2 kg
  • C 70.0 kg
  • D 78.4 kg
View Answer & Explanation
Question 5:
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 ?
  • A Multiple proportion
  • B Conservation of mass
  • C Constant composition
  • D Reciprocal proportion
View Answer & Explanation