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Question: Answered & Verified by Expert
Assertion : Photochemical smog results from the action of sunlight on $\mathrm{NO}_x$ and hydrocarbons.
Reason : It occurs in warm, dry and sunny climate.
ChemistryEnvironmental ChemistryAIIMSAIIMS 2019 (25 May)
Options:
  • 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.
Solution:
2785 Upvotes Verified Answer
The correct answer is: If both assertion and reason are true but reason is not the correct explanation of assertion.
$\mathrm{NO}_x$ and hydrocarbons in the presence of sunlight give ozone, aldehydes, ketones and peroxyacyl nitrates (PAN) which form photochemical smog.

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