When excess $C_6H_6$ is reacted with $CH_2Cl_2$ in the presence of anhydrous $AlCl_3$,which of the following products is obtained?

Which of the following reactions is not possible for benzene due to its reversible nature?

In the $Friedel-Crafts$ reaction,anhydrous $AlCl_3$ is used because it is ............

Benzene was discovered by.....

For the following Friedel-Crafts alkylation reaction, which of the statements are correct?
$A$. Major product is n-propyl benzene.
$B$. iso-propyl carbocation intermediate is also generated.
$C$. Multiple substitution is inevitable.
$D$. Introducing electron-donating substituent on benzene will not produce any alkyl benzene.

On attachment of $H$ and $Br$ from the $HBr$ to $C_6H_5$ free radical,what can be formed?