Identify the product $A$ in the following reaction:
$C_6H_6 + CH_2Cl_2 \xrightarrow{\text{Anhy. } AlCl_3} A$

Cyclic hydrocarbon molecule $A$ has all the carbon and hydrogen atoms in a single plane. All the carbon-carbon bonds are of the same length and are less than $1.54 \ \mathring{A}$ but more than $1.34 \ \mathring{A}$. The $C-C-C$ bond angle will be:

In the conversion of $A$ to $B$,the electrophile involved is:

Which of the following statements regarding Friedel-Crafts alkylation is incorrect?

Which of the following hydrogens is most easily abstracted on reaction with bromine free radicals,$Br^{\cdot}$?

In the $Friedel-Crafts$ reaction,anhydrous $AlCl_3$ is used because it is ............