Question

Photochemical smog consists of
A) $O_3$, $SO_2$ and hydrocarbons
B) $O_3$ , PAN and $NO_X$
C) $SO_2$,$CO_2$ and hydrocarbons
D) $SO_2$, PAN and Smoke

Answer 1

Photochemical smog is a kind of smog generated when ultraviolet light from the sun responds with nitrogen oxides in the environment. It is apparent as a brown haze, and is most important during the daylight and afternoon, particularly in densely populated, calm cities.

Complete answer:
Before, we discuss the given options, let us know a little more about photochemical smog. Photochemical smog shapes from a complicated process, however the basis of it is quite evident. The largest proponent is automobiles, while coal-fired power factories and some other power plants also generate the essential pollutants to stimulate its generation. Due to its amount in regions of warmer weathers, photochemical smog is most widespread in the summer.

Option C: The photochemical outcome is affected by absorption of energy in the aspect of light. The word smog is shaped like smoke and fog. Photochemical smog is the important supporter of air corruption and is formulated of fundamental and secondary pollutants. Primary being the nitrogen oxides and unstable organic mixtures. Unsaturated hydrocarbons are those that have dual or triple covalent bonds among neighboring carbon atoms. The emitted sulphur dioxide is corroded in the troposphere thereby establishing sulphuric acid which on blending with water forms the element of acid rain. Therefore, option C is the correct answer. As option C is the correct answer, option A, B and D is the incorrect option.

Hence the correct answer is option ‘C’.

Note: Photochemical smog has many unfavorable effects. When incorporated with hydrocarbons, the chemicals within it form particles that cause eye irritation. Radicals in the air interfere with the nitrogen cycle by deterring the demolition of floor level ozone. Other impacts include lessened vision and respiratory diseases.