An important insecticide is obtained by the action of chloral on chlorobenzene. It is

Which one of the following possesses the highest melting point?

In the Gattermann reaction, which of the following catalysts is used?

Identify the name of the reaction in which an aryl halide reacts with an alkyl halide and sodium metal in dry ether to produce substituted aromatic compounds.

The decreasing order of reactivity of $m$-nitrobromobenzene $(I)$,$2,4,6$-trinitrobromobenzene $(II)$,$p$-nitrobromobenzene $(III)$,and $2,4$-dinitrobromobenzene $(IV)$ towards $OH^{-}$ ions is

Which of the following reactions cannot be used to prepare an aromatic nitrile $(ArCN)$?