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Haloalkanes And Haloarenes

Question
CBSEENCH12007917

A hydocarbon (Z) has molecular formula C8H10. It does not decolourise bromine water and is oxidised to benzoic acid on heating with K2Cr2O7 . It can also have the three other isomers A, B and C. Write the structure of A, B and C.

Solution
Since it does not decolourise bromine water, it is arene, its formula is

The other three isomers are: