JAMB Chemistry Past Questions & Answers - Page 160

796.

3Cl2 + 2NH3 \(\to\) N2 + 6HCl. In the above reaction, ammonia acts as

A.

a reducing agent

B.

an oxidizing agent

C.

an acid

D.

a catalyst

E.

a dry agent

Correct answer is A

No explanation has been provided for this answer.

797.

An example of a neutral oxide is

A.

AL2O3

B.

NO2

C.

CO2

D.

CO

E.

SO2

Correct answer is D

No explanation has been provided for this answer.

798.

From the reactions : ZnO + Na2O \(\to\) NaZnO and ZnO + CO2 \(\to\) ZnCO3 it may be concluded that zinc oxide is

A.

neutral

B.

basic

C.

acidic

D.

amphoteric

E.

a mixture

Correct answer is D

No explanation has been provided for this answer.

799.

Which of the following statements is NOT true of carbon monoxide?

A.

CO is poisonous

B.

CO is readily oxidized at room temperature by air to form CO2

C.

CO may be prepared by reducing CO2 mixed with coke heated to about 1000oC

D.

CO may be prepared by heating charcoal with a limited amount of O2

E.

CO is a good reducing agent

Correct answer is B

No explanation has been provided for this answer.

800.

Sulphur

A.

forms two alkaline oxides

B.

is spontaneously flammable

C.

burns with a blue flame

D.

conducts electricity in the molten state

E.

is usually stored in the form of sicks in water

Correct answer is C

No explanation has been provided for this answer.