Coal tar is the main source of $....$.

Product '$A$' in the above reaction is:

The enthalpy of hydrogenation of cyclohexene is $-119.5 \ kJ \ mol^{-1}.$ If resonance energy of benzene is $-150.4 \ kJ \ mol^{-1},$ its enthalpy of hydrogenation would be $...... \ kJ \ mol^{-1}.$

Toluene has

Which of the following oil is obtained from benzene after fractional distillation of coal tar?

Benzene reacts with $n-$propyl chloride in the presence of anhydrous $AlCl_3$ to give predominantly