Jamb Chemistry 1982 Past Questions and Answers

Question 6:

• JAMB 1982

Cotton is almost pure?

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

Question 7:

• JAMB 1982

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

A. Substitution
B. Polymerization
C. Addition
D. Saponification
E. Oxidation

Question 8:

• JAMB 1982

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

A. Sodium
B. Chlorine
C. Hydrogen
D. Sodium hydroxide
E. Oxygen

Question 9:

• JAMB 1982

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

A. Deliquescence
B. Hygroscopy
C. Oxidation
D. Efforescence
E. Sublimation

Question 10:

• JAMB 1982

Which of the following statements is incorrect?

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