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What is photochemical smog ?...

What is photochemical smog ?

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it is grey or yellowish brown opaque smog having oxidising environment, but little smoke. It contains secondary pollutants or photochemical oxidants e.g., PAN (Peroxyacyl nitrates). In areas with intense solar radiations, Photochemical smog forms brown air and areas with lesser solar radiations, smog formation is incomplete and produces grey air.
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Knowledge Check

  • Which of the following does not contribute towards the formation of photochemical smog?

    A
    NO
    B
    `SO_2`
    C
    `O_3`
    D
    Hydrocarbons

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