Product $A$ is

What happens when
$(i)$ $n$-butyl chloride is treated with alcoholic $KOH$.
$(ii)$ bromobenzene is treated with $Mg$ in the presence of dry ether.
$(iii)$ chlorobenzene is subjected to hydrolysis.
$(iv)$ ethyl chloride is treated with aqueous $KOH$.
$(v)$ methyl bromide is treated with sodium in the presence of dry ether.
$(vi)$ methyl chloride is treated with $KCN$?

Explain two differences between haloalkanes and haloarenes.

In which of the following compounds does the carbon atom attached to the halogen possess $sp^2$ hybridization?

How many $(\sigma)$ and $(\pi)$ bonds are present in the structure of $DDT$ respectively?

What will be the final product in the given reaction?