Which of the following compounds does not undergo the Friedel-Crafts reaction?

For the electrophilic aromatic substitution reaction on the benzene ring,the substituents are $-CH_3$,$-CH_2Cl$,$-CHCl_2$,and $-CCl_3$. What is the increasing order of reactivity towards electrophilic substitution?

The enthalpy of hydrogenation of benzene is $\Delta H_1$ and for cyclohexene is $\Delta H_2$. Then the resonance energy of benzene is:

How is $2,4,6-$trinitrotoluene widely used?

Which of the following compounds upon oxidation gives isophthalic acid?

The conversion of benzene to toluene is carried out by .........