Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 111:

• JAMB 2003

The leachate of a certain plant ash is used in local soap making because it contains

A. Sodium chloride and potassium hydroxide
B. Sodium hydroxide
C. Potassium hydroxide
D. Soluble carbonates and hydrogen carbonates

Question 112:

• JAMB 2004

Which of the following gases can be collected by the method of downward delivery?

A. Chlorine
B. Oxygen
C. Ammonia
D. Hydrogen

Question 113:

• JAMB 2004

Aluminium hydroxide is used in the dyeing industry as a

A. Salt
B. Dye
C. Mordant
D. Dispersant

Question 114:

• JAMB 2004

In the production of soap, concentrated sodium chloride solution is added to

A. Increase the solubility of soap
B. Decrease the solubility of the soap
C. Saponify the soap
D. Emulsify the soap

Question 115:

• JAMB 2004

In the experiment above, X is a mixture of nitrogen, carbon (IV) oxide and

A. Water
B. Impurities
C. Inert gas
D. Oxygen