Question

Given below are two statements:

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

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

• A. Both statement I and statement II are true
• B. Statement I is true but statement II is false
• C. Both statement I and statement II are false
• D. Statement I is false but statement II is true

Answer 1

The correct option is C Both statement I and statement II are false

Reducing smog acts as a reducing agent and the reducing character is due to the presence of sulphur dioxide and carbon particles. Hence, ozone (i.e. an allotrope of oxygen) is not used in the formation of reducing smog.
Tropospheric pollutants such as hydrocarbon and nitrogen oxide contirbute to the formation of photochemical smog.