WAEC Chemistry Past Questions & Answers - Page 92

456.

The energy value of petrol can be determined by a

A.

bomb calorimeter

B.

catalytic cracker

C.

fractionating column

D.

thermometer

Correct answer is C

No explanation has been provided for this answer.

457.

The reaction of sucrose with dilute HCI produces

A.

an alkanoate

B.

glucose and fructose

C.

a black mass of carbon

D.

a polysaccharide

Correct answer is B

No explanation has been provided for this answer.

458.

A suitable reagent for distinguishing between ethanoic acid ethanol is

A.

bromine water

B.

Fehling's solution

C.

sodium hydrogentrioxocarbonate (IV)

D.

ammoniacal silver trioxonitrate (V)

Correct answer is C

No explanation has been provided for this answer.

459.

Which of the following types of alkanols undergo oxidation to produce alkanoic acids? 1. Primary alkanols 11. Secondary alkanols 111. Tertiary alkanols

A.

1,11 and 111

B.

l and ll only

C.

ll only

D.

l only

Correct answer is D

No explanation has been provided for this answer.

460.

The reaction between ethene and chlorine to form 1, 2-dichloroethane is

A.

oxidation

B.

polymerization

C.

addition

D.

substitution

Correct answer is C

No explanation has been provided for this answer.