First slide

Air Pollution and its Control

Question

Photochemical smog formed in congested metropolitan cities mainly consists of

Easy

A

ozone, peroxyacetyl nitrate and NO_X
B

hydrocarbons, SO₂ and CO₂
C

smoke, peroxyacetyl nitrate and SO₂
D

hydrocarbons, ozone and SO_X

Solution

The major undesirable components of photochemical smog are nitrogen dioxide (NO₂), ozone (O₃), PAN (peroxyacetylnitrate), and chemical compounds that contain the –CHO group (aldehydes).

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