Chemistry questions and answers

Chemistry Questions and Answers

Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.

2,136.

Bubbling of carbon (IV)oxide into calcium hydroxide solution results in the formation of

A.

CaCO3

B.

CuCO3

C.

ZnCO,sub>3

D.

Na2CO3

E.

MgCO3

Correct answer is A

No explanation has been provided for this answer.

2,137.

What quantity of silver is deposited when 96500C of electricity is passed through a solution containing silver ions? (Ag = 108, 1F = 96500C)

A.

1.08g

B.

40g

C.

10,.8g

D.

21.6g

E.

108g

Correct answer is E

No explanation has been provided for this answer.

2,138.

The following are heavy chemicals except

A.

tetraoxosulphate (IV) acid

B.

caustic soda

C.

sodium trioxocarbonate (IV)

D.

ethene

E.

dyes

Correct answer is E

No explanation has been provided for this answer.

2,139.

The main characteristic feature of transition metals is that they

A.

have the same atomic size

B.

are reducing agents

C.

from ions easily

D.

have variable oxidation states

E.

are highly electropositive

Correct answer is D

No explanation has been provided for this answer.

2,140.

The following are uses of radioactive isotopes except for

A.

sterilization of medical equipment

B.

tracing reaction paths

C.

dating elements

D.

radiography

E.

determining equilibrum positions

Correct answer is E

No explanation has been provided for this answer.