Question

Given below are two statements:

Statement 1: An allotrope of oxygen is an important intermediate in the formation of reducing smog.

Statement 2:Gases such as oxides of nitrogen and sulphur present in the troposphere contribute to the formation of photochemical smog.

• A. Statement 1 and statement 2 are true
• B. Statement 1 is true about statement 2 is false
• C. Both statement 1 and statement 2 are false
• D. Statement 1 is false but statement 2 is true

Answer 1

The correct option is C

Both statement 1 and statement 2 are false

Answer (C)

Explanation for incorrect option :

Statement -1

Reducing smog is a mixture of smoke, fog and sulphur dioxide$\left({\mathrm{SO}}_2\right)$ . Tropospheric pollutants such as hydrocarbon and nitrogen oxide(${\mathrm{NO}}_2$) contribute to the formation of photochemical smog.

Statement -2

Photochemical smog also known as summer smog, is a type of smog that is produced when UV light originating from the sun interacts with the oxides of nitrogen present in the atmosphere. This type of smog usually manifests as a brown haze and is most commonly seen in highly populated cities that are placed in relatively warm climate.

Hence option (C) is correct option.