Which of the following structures represents cumene?

The number of $sp^2$ and $sp^3$ hybridised carbons in cumene,respectively,are:

An aromatic compound,among other things,should have a $\pi$-electron cloud containing $(4n + 2)$ electrons,where $n$ cannot be:

Which of the following can not react with Bayer's reagent?

When comparing the hydrogenation of benzene with that of a hypothetical $1,3,5-$cyclohexatriene,benzene .................... than the cyclohexatriene.

Number of $\pi$ electrons present in naphthalene is :