The non-aromatic compound among the following is

What is the total number of benzene derivatives with the molecular formula $C_7H_8O$?

Which of the following is most reactive towards nitration?

Among the following compounds,the one that undergoes sulfonation most easily is .......

Which compound is formed when benzene is heated with chlorine in the presence of sunlight?

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.