WAEC Chemistry Past Questions & Answers - Page 247

1,231.

Fructose and glucose are classified as carbohydrates because they

A.

are crystalline white solids

B.

are energy -giving substances

C.

are naturally occurring organic compounds

D.

contain carbon oxygen and hydrogen

E.

conform to the general formula Cx(H2O)y

Correct answer is E

No explanation has been provided for this answer.

1,232.

The following can be obtained directly from the destructive distillation of coal except

A.

ammoniacal liquor

B.

coke

C.

producer gas

D.

coal gas

E.

coal tar

Correct answer is C

No explanation has been provided for this answer.

1,233.

Which of the following is hydrocarbons is unsaturated?

A.

Ethane

B.

Benzene

C.

Propane

D.

2 - methylbutane

E.

2,2,4-trimethylpentane

Correct answer is B

No explanation has been provided for this answer.

1,234.

The following statements about graphite are correct except that it

A.

is used as a lubricant

B.

has a network structure

C.

contains mobile free electrons

D.

is good conductor

E.

is an allotrope of carbon

Correct answer is B

No explanation has been provided for this answer.

1,235.

H3O+(aq) + OH-(aq) → 2H2O(l). The heat change accompanying the process represented by the equation above is the heat of

A.

neutralization

B.

formation

C.

solution

D.

dilution

E.

hydration

Correct answer is A

No explanation has been provided for this answer.