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.

1,901.

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.

1,902.

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.

1,903.

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.

1,904.

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.

1,905.

Which of the following is not correct of the reaction represented by the equation below? 2C(s) + O2(g) → 2CO(g); ∆H = - xKJ

A.

there is an increase in entropy

B.

There is anincrease in gaseous volume

C.

Carbon (lV) oxide is produced

D.

The oxidation number of carbon increases from 0 to +2

E.

The reaction is exothermic

Correct answer is C

No explanation has been provided for this answer.