The branch of chemistry that aims to design product/process which minimize the use and/or generation of pollution is :

1. Industrial chemistry
2. Green chemistry
3. Analytical chemistry
4. Biochemistry

Locking of chlorine monoxide and free radicals of chlorine is called SCAVENGING. In the atmosphere, nitrogen dioxide scavenges chlorine monoxide and methane scavenges chlorine atoms, which are responsible for:

P — Acid rain

Q — Global warming

R — Ozone depletion

1. Only P
2. Only Q
3. Only R
4. Both P and Q

Assertion (A): There is a gradual increase in the average temperature of the earth's surface.

Reason (R): Greenhouse effect is responsible for the increase in earth's temperature.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Excessive burning of fossil fuels and the use of automobiles do not cause air pollution.

Reason (R): Incomplete combustion of fuels which leads to the formation of CO is a cause of air pollution.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.