When benzene vapor is passed through a tube at $700 - 800\,^oC$ or over molten lead,it yields ........

The product formed when acetylene is passed through a red-hot tube is:

Which of the following are aromatic species?
$(A)$ Cyclohexa$-2,4-$dienyl cation
$(B)$ Naphthalene
$(C)$ Tropone (Cycloheptatrienone)
$(D)$ Cyclohexa$-1,3-$diene

What products are formed when the following compound is treated with $Br_2$ in the presence of $FeBr_3$?

The suitable product of this reaction is:

Choose the best method to prepare the given compound: