Heating chlorobenzene with aqueous $NH_3$ in the presence of $Cu_2Cl_2$ gives ..........

Which of the following compounds undergoes electrophilic substitution slower than benzene?

In the following reaction,the structure of the major product '$X$' is

Which of the following $n$ mole compound is obtained when $2n$ moles of $C_6H_5Cl$ are treated with $2n$ moles of sodium atom in the presence of dry ether?

Which of the following is the strongest meta-directing group?

The major product obtained on the monobromination (with $Br_2/FeBr_3$) of the following compound $A$ is