Nitration of toluene occurs at the ....... position.

For the given compounds,what is the decreasing order of the rate of electrophilic aromatic substitution?

Give examples of Friedel-Crafts alkylation.

Which of the following structures represents cumene?

Given below are two statements:
Statement $I$: Nitration of benzene involves the following step:
$H-O^+(H)-NO_2 \rightleftharpoons H_2O + NO_2^+$
Statement $II$: Use of Lewis base promotes the electrophilic substitution of benzene.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following is a hydrocarbon?