WAEC Past Questions and Answers - Page 1739

8,691.

When an atom gains an electron, it becomes properties

A.

chemically inactive

B.

negatively charged

C.

oxidized

D.

a cation

E.

a complex ion

Correct answer is B

No explanation has been provided for this answer.

8,692.

The existance of two or more forms of the same element in the same physical state is known as

A.

allotropy

B.

resonance

C.

hybridization

D.

isotopy

E.

isomerism

Correct answer is A

Allotropy or allotropism is the property of some chemical elements to exist in two or more different forms, in the same physical state.

8,693.

When a change in price brings on change in demand, the situation is described as

A.

Perfectly inelastic

B.

Perfectly elastic

C.

Fairly inelastic

D.

Fairly elastic

Correct answer is B

No explanation has been provided for this answer.

8,694.

The advantages derived from the efficient combination of factors of production in agriculture include the following except

A.

Reduced production cost

B.

Increased production cost

C.

Increased profit margins

D.

Increased gross revenue

Correct answer is B

No explanation has been provided for this answer.

8,695.

When different breeds of animals are mated, the process is known as

A.

Crossbreeding

B.

In-breeding

C.

Out-breeding

D.

Line breeding

Correct answer is A

No explanation has been provided for this answer.