Each carbon atom in benzene is in the state of hybridization:

What is the number of $\sigma$ and $\pi$ bonds in benzene $(C_6H_6)$?

The correct order of the rate of $EAS$ (electrophilic aromatic substitution) for the given compounds is:

$A$ compound $X$ formed after heating coke with lime reacts with water to give $Y$,which on passing over red hot iron at $873 \ K$ produces $Z$. The compound $Z$ is:

Arrange the following compounds in decreasing order of their reactivity towards electrophilic substitution $(E^{+})$:
$C_6H_5NH_2$,$C_6H_5NHCOCH_3$,$C_6H_6$,$C_6H_5SO_3H$

Reaction of $SO_3$ is easier in: