The catalyst used in Raschig's process is

The presence of the chlorine atom on the benzene ring makes the second substituent enter at which position?

$CH \equiv CH$ $\xrightarrow{\text{Red Hot Fe tube}} A$ $\xrightarrow[\text{Dark}]{Cl_2 / FeCl_3} B$ $\xrightarrow[\text{Anhy. } AlCl_3]{CH_3 - Cl} C$ (Major)
Product '$C$' is

The highest yield of $m-$ product is possible by the electrophilic substitution of the following:

The product $(A)$ of the following reaction is:

Which of the following groups is an ortho and para directing group?