$C_6H_6Cl_6$,on treatment with alcoholic $KOH$,yields

Reaction of aqueous sodium hydroxide on $(i)$ ethyl bromide and $(ii)$ chlorobenzene gives

The $C-Cl$ bond lengths (in $pm$) in haloarene and haloalkane are respectively:

$1$-$Chloro$-$4$-$nitrobenzene$,$1$-$Chloro$-$2,4$-$dinitrobenzene$ and $1$-$Chloro$-$2,4,6$-$trinitrobenzene$ are transformed to corresponding phenols with the reagents $X$,$Y$,$Z$ respectively. What are $X$,$Y$,$Z$?

Which of the following compounds does not give a tribromo derivative upon reaction with $Br_2/H_2O$?

The $C-Cl$ bond in chlorobenzene as compared with the $C-Cl$ bond in methyl chloride is: