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

Tropolone is

The main product of the following reaction will be

The product obtained by the reaction of benzene with concentrated $HNO_3$ and concentrated $H_2SO_4$ at $353$ to $363 \, K$ is....

Benzene is obtained from

Nitration is an example of aromatic electrophilic substitution reaction and its rate depends upon the group already present in the benzene ring. Out of benzene and phenol,which one is more easily nitrated?