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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A dihalogen derivative ‘X’ of a hydrocarbon with three carbon atoms reacts with alcoholic KOH and produces another hydrocarbon which forms a red precipitate with ammoniacal Cu2Cl2. ‘X’ gives an aldehyde on reaction with aqueous KOH.

A dihalogen derivative ‘X’ of a hydrocarbon with three carbon atoms reacts with alcoholic KOH and produces another hydrocarbon which forms a red precipitate with ammoniacal Cu2Cl2. ‘X’ gives an aldehyde on reaction with aqueous KOH.

4-dinitrochlorobenzene is readily replaced because Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2