WAEC Chemistry Past Questions & Answers - Page 250

1,246.

Which of the following cannot be deduced from the electronic configuration of a transition metal?

A.

Possession of magnetic property

B.

Ability to form complex ions

C.

Position in the Periodic Table

D.

Variable oxidation states

E.

Physical properties of the metal

Correct answer is A

No explanation has been provided for this answer.

1,247.

Which of the following molecules is linear in shape?

A.

CH4

B.

H2O

C.

NH3

D.

H2S

E.

CI2

Correct answer is E

No explanation has been provided for this answer.

1,248.

If a solid has a low melting point and dissolves readily in benzene, it would probably

A.

contain strong electrostatic forces of attraction

B.

conduct electricity in the molten state

C.

dissolve in water

D.

have covalent bonding

E.

absorb moisture on exposure to air

Correct answer is D

No explanation has been provided for this answer.

1,249.

What is the molar mass of an alkyne with the formula Cx H 14? (H = 1, C = 12)

A.

86g

B.

92g

C.

98g

D.

110g

E.

112g

Correct answer is D

No explanation has been provided for this answer.

1,250.

The following compounds contain the same type of bonds except

A.

sodium chloride

B.

hydrogen chloride

C.

magnesium chloride

D.

potassium chloride

E.

lithium chloride

Correct answer is B

No explanation has been provided for this answer.