The full form of PAN, a type of air pollutant, is

APeroxyacetyl nitrates ✓ Correct

BPeroxyacetyl nitrites

CPolycyclic acyl nitrates

DPolycyclic acyl nitrites

Correct answer: (A) Peroxyacetyl nitrates

Explanation

PAN stands for peroxyacetyl nitrates, a secondary pollutant in photochemical smog.

The nitrite version is not the correct expansion of the term.

Polycyclic acyl nitrates is not what the abbreviation denotes.

Polycyclic acyl nitrites is likewise not the right full form.

Peroxyacetyl nitrates form when hydrocarbons and nitrogen oxides react in sunlight.

They irritate the eyes, damage plants and are a marker of urban smog.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.