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Question
Which of the following statements is not true about classical smog?
Options
Its main components are produced by the action of sunlight on emissions of automobiles and factories.
Produced in cold and humid climate.
It contains compounds of reducing nature.
It contains smoke, fog and sulphur dioxide.
Solution
Its main components are produced by the action of sunlight on emissions of automobiles and factories.
Explanation:
Classical smog is initiated by a mixture of SO2, particulates and high humidity in the atmosphere in cold conditions. A fog of H2SO4 droplets formed condenses on the particulates to form the smog. It is of reducing nature. The gases released by automobiles and factories are not responsible for classical smog.
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