A powerful eye irritant present in smog is
A
Nitric oxide
B
Sulphur dioxide
C
Peroxyacetyl nitrate
D
Carbon dioxide
Correct Answer: Peroxyacetyl nitrate
Peroxyacetyl nitrate is a secondary pollutant present in photochemical smog. It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. It is a lachrymatory substance.