Catalytic dehydrogenation of $n-heptane$ in the presence of $Cr_2O_3/Al_2O_3$ at $750 \ K$ gives:

Which of the following is most reactive towards sulphonation?

How many $\pi$ electrons are present in naphthalene to decide its aromaticity?

Which of the following statements is incorrect?

Provide basic information about aromatic hydrocarbons. Explain and give examples of the following: $(i)$ Aromatic compounds $(ii)$ Arenes $(iii)$ Benzenoid compounds $(iv)$ Non-benzenoid compounds.

What is the total number of benzene derivatives with the molecular formula $C_6H_3Cl_3$?