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Q.

Photochemical smog formed in congested metropolitan cities mainly consists of

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a

ozone, peroxyacetyl nitrate and NOX

b

hydrocarbons, SO2 and CO2

c

smoke, peroxyacetyl nitrate and SO2

d

hydrocarbons, ozone and SOX

answer is A.

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Detailed 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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