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Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry5 Marks
Question
What is smog? How is classical smog different from photochemical smogs?
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Answer

Smog is a kind of air pollution. It is the blend of smoke and fog. There are two kinds of smog:
  1. Classical smog.
  2. Photochemical smog.
The two smogs can be differentiated as follows:
  Classical smog Photochemical smog
Occurrence It occurs in a cool, humid climate. It occurs in a dry, sunny climate.
Components Smoke, fog, and sulphurdioxide. PAN, acrolein, ozone, formaldehyde, nitric oxide.
Nature It is reducing in nature. It is oxidizing in nature.

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