set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which allotropy of carbon is in rigid three- dimensional structure?

a) Fullerene

b) Diamond

c) Graphite

d) Carbon black

Question : 2

The main constituents of pearl are

a) Aragonite and Conchiolin

b) Ammonium Sulphate and Sodium Carbonate

c) Calcium Carbonate and Magnesium Carbonate

d) Calcium Oxide and Ammonium Chloride

Question : 3

One of the constituents of amalgam is

a) iron

b) aluminium

c) copper

d) mercury

Question : 4

Assertion (A):
Sodium metal is stored under kerosene.
Reason (R):
Metallic sodium melts when exposed to air.

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 5

Which of the following is the electron configuration of a metallic element?

a) 2, 8, 7

b) 2, 8, 8

c) 2, 8

d) 2, 8, 8, 2