Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 206:

• JAMB 2003

The principal constituent of natural gas is

A. Methane
B. Ethane
C. Propane
D. Butane

Question 207:

• JAMB 2004

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

A. Evaporation
B. Distillation
C. Crystallization
D. Sublimation

Question 208:

• JAMB 2004

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

A. Evaporation
B. Distillation
C. Crystallization
D. Sublimation

Question 209:

• JAMB 2004

A chemical reaction is always associated with

A. An increase in the composition of one of the substance
B. A change in the volume of the reactants
C. A change in the nature of the reactants
D. The formation of new substance

Question 210:

• JAMB 2004

The allotropy of carbon used in the decolourization of sugar is

A. Graphite
B. Soot
C. Charcoal
D. Lampblack