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  3. Chemistry
  4. Assertion: Classical smog is oxidising smog whereas photochemical smog is reducing smog. Reason: Classical smog occurs in warm, dry and sunny climate whereas photochemical smog occurs in cool humid climate.

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Q. Assertion : Classical smog is oxidising smog whereas photochemical smog is reducing smog.
Reason : Classical smog occurs in warm, dry and sunny climate whereas photochemical smog occurs in cool humid climate.

Environmental Chemistry

Solution:

Classical smog occurs in cool humid climate. Chemically it is a reducing mixture and so it is also called as reducing smog.
Photochemical smog occurs in warm, dry and sunny climate. It has high concentration of oxidising agents and is therefore, called as oxidising smog.