WAEC Past Questions and Answers - Page 1782

8,906.

The total land area of a country available for farming depends on the

A.

Level of literacy of farmers

B.

Climate of the area

C.

Sex distribution of the population

D.

Number of houses and other structures

Correct answer is B

No explanation has been provided for this answer.

8,907.

If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?

A.

the reaction vessel gets hotter as the reaction proceeds

B.

∆H for the reaction is positive

C.

the rate of the reaction increases with time

D.

the activation energy of the reaction is high

E.

the rate of the reaction increases with time

Correct answer is A

No explanation has been provided for this answer.

8,908.

Vulcanization of rubber

A.

stops the growth of fungus on the rubber

B.

increases the solubility of the rubber

C.

decreases the elasticity of the rubber

D.

hardnes the rubber through cross-linkage

E.

removes sulphur from the rubber

Correct answer is D

No explanation has been provided for this answer.

8,909.

The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the

A.

bond energy

B.

ionization energy

C.

potential energy

D.

activation energy

E.

kinetic energy

Correct answer is B

No explanation has been provided for this answer.

8,910.

Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics?

A.

Ethyne

B.

Ethane

C.

Monochloroethene

D.

Propene

E.

Butadiene

Correct answer is B

No explanation has been provided for this answer.