WAEC Chemistry Past Questions & Answers - Page 179

891.

Which of the following pollutants is biodegradable?

A.

Domestic sewage

B.

Metal scraps

C.

Radioactive waste

D.

Plastic foil

Correct answer is A

No explanation has been provided for this answer.

893.

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.

894.

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.

895.

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.