Question

what Happened when benzene is exposed in sunlight

Answer 1

In the presence of ultraviolet light (but without a catalyst present), hotbenzene will also undergo an additionreaction with chlorine or bromine. The ring delocalisation is permanently broken and a chlorine or bromine atom adds on to each carbon atom.

Answer 2

$\huge\textcolor{orange}{\rm{Answer :-}}$

When benzene is exposed to sunlight, hot benzene will undergo an addition reaction with chlorine or bromine. The ring delocalisation of benzene will get permanently broken and a chlorine or bromine atom adds on to each carbon atom.

For example, if you bubble chlorine gas through hot benzene exposed to UV light for an hour, you get 1,2,3,4,5,6-hexachlorocyclohexane or benzenehexachloride.