Jamb Chemistry Past Questions and Answers

Question 186:

• JAMB 1980

Hardening of an oil may be achieved by?

A. Boiling the oil with water
B. Boiling the oil with a catalyst
C. Treating the oil with sodium hydroxide
D. Treating the oil with hydrogen and catalyst
E. Distilling oil under reduced pressure

Question 187:

• JAMB 1980

Hardening of an oil may achieved by?

A. Boiling the oil with water
B. Boiling the oil with a catalyst
C. Treating the oil with sodium hydroxide
D. Treating the oil with hydrogen and catalyst
E. Distilling oil under reduced pressure

Question 188:

• JAMB 1980

A cold aqueous solution of sodium chloride is electrolyzed using a graphite anode and an iron cathode. In the course of the electrolysis the electrolyte is continuously stirred. The liquid left after electrolysis will therefore consist of?

A. Sodium hydroxide solution
B. Chlorine water
C. Pure water
D. Sodium hypochlorite solution
E. Hydrochloric acid solution

Question 189:

• JAMB 1980

The best way of collecting chlorine is?

A. By downward displacement of air
B. By upward displacement of air
C. Over water
D. Under water
E. Over mercury

Question 190:

• JAMB 1980

Cellulose and starches can be classified as one of the following?

A. Sugars
B. Sucrose
C. Hydrocarbons
D. Carbohydrates
E. Isomers