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Question

Q58. Which one of the following pollutants is a secondary pollutant?

A
(a) Carbondioxide
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B
(b) Suspended particulate matters
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C
(c) DDT
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D
(d) PAN
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Solution

The correct option is D (d) PAN
Peroxyacetyl nitrate (PAN) is formed by the interaction of nitrogen oxides and hydrocarbons.

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