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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 6:

Cotton is almost pure?

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A Starch
B Protein
C Animal fibre
D Celluose
E Mineral fibre

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Question 7:

Which of the following types of reactions takes place between C₂H₄ and the halogens?

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A Substitution
B Polymerization
C Addition
D Saponification
E Oxidation

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Question 8:

The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is?

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A Sodium
B Chlorine
C Hydrogen
D Sodium hydroxide
E Oxygen

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Question 9:

Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as?

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A Deliquescence
B Hygroscopy
C Oxidation
D Efforescence
E Sublimation

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Question 10:

Which of the following statements is incorrect?

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A Calcium reacts with water to form calcium
B Magnesium reacts very slowly with water but faster with warm water
C Iron will not react with water in the absence of air
D Sodium reacts with water
E Copper reacts with steam

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