At what angle are the carbon atoms arranged in a benzene molecule?

Which of the following is not a $m-$directing group?

$CH_3-CH_2-CH_2-Cl$ $\xrightarrow{Na, \text{Dry ether}} P$ $\xrightarrow[V_2O_5, Al_2O_3]{\Delta} Q$. $Q$ is

The molecular formula of the product formed when benzene is reacted with excess of chlorine molecules under ultra-violet light is

Which of the following benzene rings is most reactive towards an electrophile $(E^{\oplus})$?

Identify correct statement/s :
$(A)$ $-OCH_3$ and $-NHCOCH_3$ are activating groups
$(B)$ $-CN$ and $-OH$ are meta directing groups
$(C)$ $-CN$ and $-SO_3H$ are meta directing groups
$(D)$ Activating groups act as ortho- and para-directing groups
$(E)$ Halides are activating groups
Choose the correct answer from the options given below :