Inhalation of air polluted with carbon monoxide is dangerous because :

1. CO combines with O₂ dissolved in the blood.
2. CO combines with haemoglobin of blood.
3. CO removes water from the body and causes dehydration.
4. CO causes coagulation of proteins in the body.

A decrease in the amount of ozone in the stratosphere is called depletion of ozone and it is caused by :

1. UV radiations of the sun
2. excessive use of detergents
3. burning coal and wood
4. Use of CFC compounds

The acid which is not responsible for acid rain is :

1. Formic acid
2. Carbonic acid
3. Sulphuric acid
4. Nitric acid

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