Which of the following compounds has the most difficulty in breaking the $C-Cl$ bond?

Which of the following groups deactivates the benzene ring towards electrophilic substitution reaction?

Identify $A$ and predict the type of reaction.
$3\text{-bromoanisole} \xrightarrow{NaNH_2} A$

Which of the following sets of compounds is $NOT$ arranged in the order of decreasing reactivity towards electrophilic aromatic substitution?

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

The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with $OH^-$ is