Question

Photochemical smog does not contain
A. PAN
B. Ozone
C. Nitrogen dioxide
D. Carbon dioxide

Answer 1

Hint:-Photochemical smog is formed when the pollutants present in the air along with some gases react with sunlight to form a brown haze above the area. It happens in warmer areas that receive more sunlight. It is prominently visible during the morning time.

Complete Answer:-Photochemical smog contains pollutants along with the presence of nitrogen dioxide which reacts with sunlight present to form a brown haze above cities. Carbon dioxide gas does not contribute to the formation of smog in cities. Carbon dioxide is a greenhouse gas that is responsible for the global warming of the planet. The smog consists of nitrogen dioxide and other non-volatile organic compounds which in the presence of sunlight react to form the smog. Smog has adverse effects on the health of people. It irritates the eyes, coughing, and sore throat. It also interferes with the nitrogen cycle in the atmosphere and can prevent the destruction of ground-level ozone. Smog is a form of air pollution that is caused due to the mixing of smoke and fog in the area. This usually occurs in warm and sunny areas. This type of pollution has adverse effects on the lungs of the elderly and small children.


So, the answer is Option D - Carbon dioxide.

Note:- Photochemical smog is the form of air pollution in which the pollutant reacts with the sunlight and forms smog which consists of PAN (Peroxyacetyl nitrate), nitrogen oxides, and other non-volatile compounds. It can have adverse effects on the health of the person residing in such areas.