Peroxyacetyl nitrate is a:

Q. Peroxyacetyl nitrate is a:
Answer: Secondary pollutant
Notes: Peroxyacetyl nitrate (PAN) is a secondary pollutant present in photochemical smog (a mixture of air pollutants) that includes both gases and particulates. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance.

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