What is the major product $X$ in the following reaction?
$\text{Benzene} + CH_3CH_2CH_2Cl \xrightarrow{AlCl_3} (X)$

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?

All the hydrocarbons shown are very weak acids. One,however,is far more acidic than the others. Which one is the strongest acid?

What will be the product $A$ in the reaction given below?

Identify the aromatic compound.

The correct order of reactivity towards electrophilic substitution reaction is: