In benzene,the $1,3$ position is known as what?

Answer the following question: Explain which type of mechanism is involved in the alkylation of benzene?

The electrophile required for the chlorination of benzene in the presence of $FeCl_3$ is.....

Which one of the following is used in the preparation of styrene?

The function of $AlCl_3$ in Friedel-Crafts 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 $...... \ kJ \ mol^{-1}.$