From the following compounds, choose the one which is not aromatic.

The correct order of the rate of $EAS$ (electrophilic aromatic substitution) for the following compounds is:

Which xylene is most easily sulphonated?

Observe the following statements regarding $C_{60}$.
$i$. All carbons are $sp^2$-hybridised.
$ii$. It contains $12$ rings of five carbons each and $20$ rings of six carbons each.
$iii$. It is a non-aromatic compound.
$iv$. It is a pure form of carbon.
$v$. $C-C$ bond lengths in it are $143.5 \ pm$ and $138.3 \ pm$.
$vi$. It is prepared by heating graphite in an electric arc in the presence of oxygen.
The correct statements are

Which one of the following is not aromatic?

How many $\pi$-bonds are present in a naphthalene molecule?