Assertion (A): Photochemical smog is oxidising in nature. Reason (R) : Photochemical smog contains NO_2 and O_3, which are formed during the sequence of reactions.

Assertion (A): Photochemical smog is oxidising in nature. Reason (R)

1.	Assertion (A): Photochemical smog is oxidising in nature. Reason (R) : Photochemical smog contains NO_2 and O_3, which are formed during the sequence of reactions.
Answer» Both (A) and (R) are correct and (R) is the correct explanation of (A). Both (A) and (R) are correct but (R) is not the correct explanation of (A). Both (A) and (R) are not correct. (A) is not correct but R is correct. Solution :A variety of pollutants are emitted into the earth.s troposphere when fossil fuel burnt. TWO of the pollutants that are emitted hydrocarbons (unburnt fuels) and nitric oxide (NO). When these pollutants builds up to sufficiently high levels, a chain reaction occurs from their interaction with sun light in which `NO_2`OXIDISES to `NO_2`. This `NO_2` in turns absorbs ENERGY from sunlight and breaks up into nitric oxide and free oxygen atom.