JAMB Chemistry Past Questions & Answers - Page 54

266.

Which of the following alkaline earth metals react more spontaneously with water?

A.

Calcium

B.

Beryllium

C.

Magnesium

D.

Strontium

Correct answer is D

The Group 2 metals become more reactive towards water as you go down the Group.

267.

Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium?

A.

Zinc

B.

Manganese

C.

Sodium

D.

Iron

Correct answer is C

No explanation has been provided for this answer.

268.

Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with

A.

Pb

B.

Zn

C.

Ca

D.

Na

Correct answer is A

No explanation has been provided for this answer.

269.

Burning magnesium ribbon in air removes which of the following
(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?

A.

i and iv only

B.

i, ii, iii and iv only

C.

i only

D.

i and ii only

Correct answer is C

No explanation has been provided for this answer.

270.

A synthetic rubber is not obtained from the polymerization of?

A.

neoprene

B.

isoprene

C.

butandiene

D.

hexane

Correct answer is D

No explanation has been provided for this answer.