JAMB Chemistry Past Questions & Answers - Page 399

1,991.

A rock sample was added to cold dilute HNO₃. The gas evolved was passed into a solution of acidified K₂Cr₂O₇ and the solution turned green. The sample contains

A.

Cl^-

B.

NO₃^-

C.

SO₃^2-

D.

SO₄^2-

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

1,992.

The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is

A.

butanal

B.

ethanal

C.

methanal

D.

propanal

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

1,993.

Hydrogen is readily released when dilute hydrochloric acid reacts with

A.

Cu

B.

Na

C.

Au

D.

Ag

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

1,994.

which of the following polymers is suitable for packaging and electrical insulation?

A.

polyamide

B.

polyethene

C.

polycarbonate

D.

polystyrene

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,995.

The most important use of hydrogen is in the

A.

manufacture of ammonia

B.

manufacture of methyl alcohol

C.

manufacture of ethyl alcohol

D.

hydrogenation of oils

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

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