What is the major product of the following reaction?
$1,4-dichlorocyclohexa-1,4-diene \xrightarrow{Na, \text{dry ether}} ?$

Considering the reaction shown below,identify the major product:

Benzene reacts with $n-$propyl chloride in the presence of anhydrous $AlCl_3$ to give predominantly :

In the following sequence of reactions,the maximum number of atoms present in molecule $C$ in one plane is:
$A$ $\xrightarrow[Cu \text{ tube}]{\text{Red hot}} B$ $\xrightarrow[\text{Anhydrous } AlCl_3]{CH_3Cl (1 \text{ eq})} C$
($A$ is the lowest molecular weight alkyne)

Which is the correct order for the rate of sulphonation of benzene?

The product $(B)$ in the above reaction is: