Primary pollutant is that which persists in the form in which it is released in the environment eg. CO. A secondary pollutant is one which is formed from another pollutant due to change or reaction. e.g. PAN (Peroxy acytyl nitrate).

Correct Option: C

Primary pollutant is that which persists in the form in which it is released in the environment eg. CO. A secondary pollutant is one which is formed from another pollutant due to change or reaction. e.g. PAN (Peroxy acytyl nitrate).

NO₂ and SO₂ after reacting with water in atmosphere produce HNO₃ & H₂SO₄ which falls down as acid rain.

Correct Option: A

NO₂ and SO₂ after reacting with water in atmosphere produce HNO₃ & H₂SO₄ which falls down as acid rain.

Fluorides of carbon is the major pollutant from jet plane emission.

Correct Option: D

Fluorides of carbon is the major pollutant from jet plane emission.

Domestic sewage rich in organic waste leads to increase in Biological Oxygen Demand, which leads to decrease D.O. (dissolved oxygen) which leads to death of fishes.

Correct Option: D

Domestic sewage rich in organic waste leads to increase in Biological Oxygen Demand, which leads to decrease D.O. (dissolved oxygen) which leads to death of fishes.

CO₂ in its normal fraction in air (about 0.03%) is actually not a pollutant but above this it is considered as a pollutant. At the elevated level it becomes a cause for global warming.

Correct Option: B

CO₂ in its normal fraction in air (about 0.03%) is actually not a pollutant but above this it is considered as a pollutant. At the elevated level it becomes a cause for global warming.