Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 81:

• JAMB 1995

An example of a secondary amine is?

A. Propylene
B. Di-butylamine
C. Methylamine
D. Trimethylamine

Question 82:

• JAMB 1997

The temperature of a body decreases when drops of liquid placed on it evaporate because?

A. The atmospheric vapour pressure has a cooling effect on the body
B. A temperature gradient exists between the drops of liquid and the body causing the latter to vaporate
C. The heat of vapourization is drawn from the body causing it to cool
D. The random motion of the liquid molecules causes a cooling effect on the body

Question 83:

• JAMB 1997

Oxidation of concentrated hydrochloric acid with manganese (IV) oxide liberates a gas used in the?

A. Manufacture of tooth pastes
B. Treatment of simple golitre
C. Vulcanization of rubber
D. Sterilization of water

Question 84:

• JAMB 1997

A compound that will NOT produce oxygen on heating is?

A. Potasium dioxonitrate (III)
B. Lead (IV) oxide
C. Potassium trioxochlorate (V)
D. Potassium trioxonitrate (V)

Question 85:

• JAMB 1997

Coal gas is made up of carbon (II) oxide, hydrogen and?

A. Nitrogen
B. Air
C. Argon
D. Methane