set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

What is the reason for white cement to be white?

a) It does not contain iron

b) It does not contain silicon

c) It does not contain carbon

d) It does not contain calcium

Question : 2

Which of the following best describes “jet streams”?

a) Narrow meandering bands of winds which blow in mid latitude near the tropopause and encircle the globe.

b) Wind blowing from sub tropical high pressure belts towards the tropical low pressure belts.

c) Wind system with seas and reversal of direction.

d) Winds blowing from the tropical high pressure belts towards the equatorial low pressure belts.

Question : 3

The statement which is not correct about control of particulate pollution

a) Gravity settling chamber removes larger particles from the air

b) Cyclone collector removes fine particles in the diameter range 5-20 microns

c) In electrostatic precipitator, the particulates are made to acquire positive charge which are then attracted by the negative electrode and removed

d) Wet scrubbers are used to wash away all types of particulates

Question : 4

Which fertilizer is assimilated directly by the plant?

a) Muriate of Potash

b) Nitrolim

c) Super phosphate

d) Humus

Question : 5

The smog is essentially caused by the presence of

a) O₂ and N₂

b) O₂ and O₃

c) Oxides of sulphur and nitrogen

d) O₃ and N₂

Question : 6

Consider the following chemicals:

1. Benzene
2. Carbon tetrachloride
3. Sodium carbonate
4. Trichloroethylene

a) 1, 2 and 4 only

b) 2 only

c) 1 only

d) 1, 2, 3 and 4