WAEC Chemistry Past Questions & Answers - Page 214

1,066.

Electrovalent compounds are characterized by

A.

solubility in ethanol

B.

high molar mass

C.

high melting point

D.

strong oxidizing ability

Correct answer is C

No explanation has been provided for this answer.

1,067.

An element Z has a combining power of 3. Which of the following formulae is correct of its compounds?

A.

ZSO3

B.

Z3CI2

C.

Z 2O 3

D.

ZS3

Correct answer is C

No explanation has been provided for this answer.

1,068.

Chlorine atom forms CI by

A.

losing one electron

B.

Sharing one electron

C.

Donating lone pair of electrons

D.

Gaining one electron

Correct answer is D

No explanation has been provided for this answer.

1,069.

The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive?

A.

Q

B.

R

C.

S

D.

T

Correct answer is C

No explanation has been provided for this answer.

1,070.

The greenhouse effect is a climatic condition associated with the presence of excess

A.

carbon (IV) oxide

B.

hydrogen sulphide

C.

nitrogen (ll) oxide

D.

ammonia gas

Correct answer is A

No explanation has been provided for this answer.