[technologist]

Can I eliminate NO2 group from Benzene ring. What r the possible rxns.

[Yggdrasil]

Reduce the nitro group to an amine (e.g. using SnCl₂) then convert the amine to a diazonium group (using NaNO₂/ HCl).  Diazonium groups can then be converted to various other groups including -H (for example, by reacting your diazonium salt with H₃PO₂).