Question

Assertion : Photochemical smog is mainly composed of nitrogen oxides, volatile organic compounds, ozone and peroxyacyl nitrates.
Reason : Photochemical smog develops in cold weather conditions by the interaction of secondary pollutants.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (C)

Photochemical smog is a condition that develops when primary pollutants (such as oxides of nitrogen and volatile organic compounds) interact under the influence of sunlight to produce a mixture of secondary pollutants. Thus photochemical smog is mainly composed of oxides of nitrogen volatile organic compounds (primary pollutants), ozone and peroxyacyl nitrate, $PAN$ (secondary pollutants).