When $C_6H_5Cl$ is heated with $NaOH$ at $300 \, ^\circ C$ under pressure,phenol is obtained. However,the yield is low because a side reaction produces ...............

Conversion of $X$ to $Y$ in the above reaction is

Identify the product of the following Wurtz-Fittig reaction.

Heating chlorobenzene with $NaOH$ at $300\,^oC$ under pressure yields ...........

In the given reaction sequence,the conversion of $Y$ to $Z$ is:

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile,$E^{+}$:
$(a)$ Chlorobenzene,$2,4-$dinitrochlorobenzene,$p-$nitrochlorobenzene
$(b)$ Toluene,$p-CH_3-C_6H_4-NO_2$,$p-O_2N-C_6H_4-NO_2$