$C_6H_6 + 3Cl_2 \xrightarrow{UV \ \text{light}} \text{Product}$. In the above reaction,the product is:

The relation between the activation energies $(E_1, E_2, E_3)$ of the following reactions is:

The function of anhydrous $AlCl_3$ in the Friedel-Crafts reaction is to

The increasing order of the rate of reaction with $HNO_3 / H_2SO_4$ is:

Given below are two statements:
Statement $I$: Nitration of benzene involves the following step:
$H-O^+(H)-NO_2 \rightleftharpoons H_2O + NO_2^+$
Statement $II$: Use of Lewis base promotes the electrophilic substitution of benzene.
In the light of the above statements,choose the most appropriate answer from the options given below:

Identify the end product $(Z)$ in the sequence of the following reactions:
$C_2H_4Br_2$ $\xrightarrow[(ii) NaNH_2]{(i) Alc. KOH} X$ $\xrightarrow[873 \ K]{\text{Red hot Fe tube}} Y$ $\xrightarrow[\text{Anhy } AlCl_3, \Delta]{CH_3COCl} Z$