The reaction of an aryl halide with sodium metal in the presence of dry ether to form a biphenyl is known as:

$C_6H_5NH_2$ $\xrightarrow[\substack{NaNO_2 \\ HCl, 0-5^{\circ}C}]{} X$ $\xrightarrow[CuCl]{HCl} Y$ $\xrightarrow[\text{dry ether}]{CH_3Cl, Na} Z$
What is $Z$ in the sequence of reactions?

In the following reaction,the compound $C$ is:
${C_7}{H_8}$ $\xrightarrow[\Delta]{3Cl_2} A$ $\xrightarrow{Br_2/Fe} B$ $\xrightarrow{Zn/HCl} C$

Identify the product of the following Wurtz-Fittig reaction.

Which of the following is the product of Fittig reaction?

Which of the following is the correct order of electrophilic substitution for the given compounds?
$(i)$ Toluene
(ii) Isopropylbenzene
(iii) tert-Butylbenzene
(iv) Ethylbenzene