JAMB Chemistry Past Questions & Answers - Page 175

871.

The products of the thermal decomposition of ammonium trioxonitrate (V) are

A.

NO 2 and oxygen

B.

NH3 and oxygen

C.

nitrogen and water

D.

N2O and water

Correct answer is D

No explanation has been provided for this answer.

872.

Bleaching powder, CaOCI2, H2O, deteriorates on exposure to air because

A.

it loses its water of crystallization

B.

atmospheric nitrogen displaces chlorine from it

C.

carbon (IV) oxide of the atmosphere displaceschlorine from it

D.

bleaching agents should be stored in solution

Correct answer is C

No explanation has been provided for this answer.

874.

Gunpower is made from charcoal, sulphur and potassium trioxonitrate (V) The salt in the mixture performs the function of

A.

an oxidant

B.

a reductant

C.

a solvent

D.

a catalyst

Correct answer is A

No explanation has been provided for this answer.

875.

Some products of destructive distillation of coal are?

A.

carbon (IV) oxide and ethanoic acid

B.

trioxocarbonate (IV) acid and methanoic acid

C.

producer gas and water gas

D.

coke and ammoniacal liquor

Correct answer is D

Heating coal, in the absence of air, is known as destructive distillation of coal. It yields various useful products like coke, coal gas, coal tar, and ammoniacal liquor.