set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

For the ceiling of diamonds, the unit of weight is carat. One carat is equal to

a) 400 mg

b) 100 mg

c) 200 mg

d) 300 mg

Question : 2

Match List-I with List-II:

a) 2 1 4 3

b) 1 2 3 4

c) 1 2 4 3

d) 2 1 3 4

Question : 3

Graphite was in news recently. What is its importance?

1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as conducting electrodes required for touch screens, LCD’s and organic LED’s.

a) 1, 2, 3 and 4

b) 1 and 2

c) 3 and 4

d) 1, 2 and 4

Question : 4

By which process, Alum cleans the muddy water?

a) Dialysis

b) Coagulation

c) Absorption

d) Adsorption

Question : 5

Water is a good solvent of ionic salts because

a) It has no colour

b) It has a high specific heat

c) It has a high boiling point

d) It has a high dipole moment

Question : 6

Large quantities of drinking water is prepared from impure water by

a) Decantation

b) Ion-exchange

c) Desalination

d) Distillation