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.

1,562.

What is the product Cx Hy in the following equation? \(C_{10}H_{22}\) → \(C_{8}H_{18}\) + CxHy

A.

butene

B.

octane

C.

ethene

D.

decane

Correct answer is C

\(C_{10}H_{22}\) → \(C_{8}H_{18}\) + CxHy

\(C_{10}H_{22}\) → \(C_{8}H_{18}\) + (\(C_2H_4\)) ⇒⇒ Ethene.

1,563.

WHICH OF THE FOLLOWING PETROLEUM FRACTIONS YIELDS VASELINE AND PARAFFIN WAX ON REDISTILLATION?

A.

DIESEL OIL

B.

LUBRICATION OIL

C.

PETROL

D.

KEROSENE

Correct answer is B

No explanation has been provided for this answer.

1,564.

Which of the following reactions will be affected by change in pressure at equilibrium?

A.

X(g) + Y(g) ⇌ W(g) + Z(g)

B.

X(g) + 2Y(g) ⇌W(g) + Z(g)

C.

2X(g) ⇌ W(g) + Z(g)

D.

2Y(g) ⇌ W(g) + Z(g)

Correct answer is B

No explanation has been provided for this answer.

1,565.

The key factor to be considered in siting a chemical industry is

A.

favourable climatic conditions

B.

the availability of space to store raw materials

C.

its nearness to other industrial establishments

D.

its nearness to the source of raw materials

Correct answer is D

No explanation has been provided for this answer.