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.

2,021.

When steam is passed over white-hot coke, the products are

A.

carbon (IV) oxide and nitrogen

B.

carbon (II) oxide and hydrogen

C.

carbon (ll) oxide and nitrogen

D.

carbon (lV) oxide and steam

Correct answer is B

Reaction:

C (white hot coke) + H\(_2\)O (steam) → CO + H\(_2\).

2,022.

Which of the following is suitable for determining different isotopes present in an element which exhibits isotopy?

A.

Sensitive weighing balance

B.

Cathoda ray tube

C.

Mass spectrometer

D.

Geiger muller counter

E.

Eudiometer

Correct answer is C

No explanation has been provided for this answer.

2,023.

Hydrogen is used for the following except

A.

manufacturing of ammonia

B.

synthesis of hydrochloric acid

C.

extinguishing fire

D.

conversion of coal to petrol

E.

manufacture of margarine

Correct answer is C

No explanation has been provided for this answer.

2,024.

In solution, aminoethanoic acid (glycine) can be represented as NH+3 CH2COO. This implies that it

A.

is soluble in all inorganic liquids

B.

can function as a weak acid or a weak base

C.

does not form salt with mineral acids

D.

is highly acidic

E.

cannot form esters with alkanols

Correct answer is B

No explanation has been provided for this answer.

2,025.

River contaminated by alkali waste will have a pH of about.

A.

1

B.

3

C.

5

D.

7

E.

9

Correct answer is E

No explanation has been provided for this answer.