WAEC Chemistry Past Questions & Answers - Page 141

701.

Dry hydrogen chloride when dissolved in methylbenzene

A.

turns blue litmus paper red

B.

turns red litmus paper blue

C.

does not affect litmus paper

D.

bleaches litmus paper

Correct answer is C

No explanation has been provided for this answer.

702.

Ethanol reacts with excess acidified K2Cr 2O7 to produce

A.

ethanal

B.

ethane

C.

ethanoic acid

D.

ethylethanoate

Correct answer is C

No explanation has been provided for this answer.

703.

What is the product of the reaction between propene and 1 mole of hydrogen iodide?

A.

CH3CHICH3

B.

CH 3CH2CHI2

C.

CH 3CH 2CI3

D.

CH 3CHICH2I

Correct answer is A

No explanation has been provided for this answer.

704.

What is the molecular formula of a compound with empirical CH2O and vapour density of 90? [H = 1, C = 12, O = 16]

A.

C4H8O 2

B.

C4H 8O3

C.

C6H10C5

D.

C6H12O6

Correct answer is D

No explanation has been provided for this answer.

705.

When protein is heated to a high temperature it undergoes

A.

condensation

B.

denaturation

C.

hydrolysis

D.

polymerization

Correct answer is B

No explanation has been provided for this answer.