Toluene is heated with limited supply of chlorine at high temperature to give ‘X’ as major product. ‘X’ is

Toluene reacts with chlorine in presence of Lewis acid in dark conditions to give o-chloro toluene and p-chloro toluene;

It is nuclear halogenation,electrophilic substitution;

Toluene reacts with chlorine in presence of light or at high temperature to give benzyl chloride;

It is side chain halogenation,free radical substitution;

${\mathrm{C}}_6{\mathrm{H}}_6+{\mathrm{Cl}}_2\stackrel{\mathrm{h\nu } \mathrm{or} \mathrm{high} \mathrm{T}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{Cl};$

The reaction continues further to give benzal chloride and benzo trichloride