Benzene, when treated with CH₂O (methanal) in presence of HCl, undergoes chloromethylation to form benzyl chloride (C₆H₅CH₂Cl). If the product is further treated with anhydrous AlCl₃, the expected product(s) is (are)

The major product of the following reaction is:

The major product obtained in the given reaction is:

What are the starting materials for the preparation of the following?

In the following reaction sequence the major products $\mathrm{A}$ and $\mathrm{B}$ are :

In the following reactions

$\mathrm{X}$ and $\mathrm{Y}$, respectively, are:

In the reaction scheme shown below, $\mathrm{Q}, \mathrm{R},$ and $\mathrm{S}$ are the major products.

 The correct structure of 

In the following reaction, compound $\mathrm{Q}$ is obtained from compound $\mathrm{P}$ via an ionic intermediate.
 

What is the degree of unsaturation of $\mathrm{Q}$?

In the reaction $\left(\mathrm{X}\right)$ and $\left(\mathrm{Y}\right)$ are respectively.

Among the following, the reaction that proceeds through an electrophilic substitution, is: