set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Identify the wrong statement in the following:

a) Greenhouse effect is responsible for global warming.

b) Acid rain is mostly because of oxides of nitrogen and sulphur.

c) Chlorofluorocarbons are responsible for ozone layer depletion.

d) Ozone layer does not permit infrared radiation from the sun to reach the earth.

Question : 2

Which one of the following statements about ozone and ozone layer is true?

a) The conversion of ozone to oxygen is an endothermic reaction

b) Ozone has a triatomic linear molecule

c) Ozone layer is beneficial to us because ozone cuts out the ultraviolet radiation of the sun

d) None of these

Question : 3

Green chemistry means such reactions which

a) reduce the use and production of hazardous chemicals

b) are related to the depletion of ozone layer

c) produce colour during reactions

d) study the reactions in plants

Question : 4

The substance having the largest concentration in acid rain?

a) HNO₃

b) HCl

c) H₂CO₃

d) H₂SO₄

Question : 5

BOD is connected with

a) organic matter

b) microbes

c) microbes and organic matter

d) None of these

Question : 6

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