In Friedel-Crafts reactions,......... is used as a catalyst.

Identify the anti-aromatic compound.

In the following reaction,$X, Y$ and $Z$ are

Which of the following compounds possesses the $C-H$ bond with the lowest bond dissociation energy?

Which of the following is not used in the Friedel-Crafts reaction?

Which among the following pairs of the structures will give different products on ozonolysis? (Consider the double bonds in the structures are rigid and not delocalized.)