On heating a mixture of sodium benzoate and sodalime,the following is obtained:

Reaction of $SO_3$ is easier in:

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

Which of the following compounds upon oxidation gives isophthalic acid?

$n-hexane$ $\xrightarrow{\text{catalyst}}$ benzene
The catalyst is:

Which of the following statements are correct with respect to benzene?
$(i)$ It forms triozonide with $O_3$.
$(ii)$ It is non-planar.
$(iii)$ It forms only one monosubstituted product with $CH_3COCl$ in the presence of anhydrous $AlCl_3$.
$(iv)$ It forms hexachlorobenzene on heating with $Cl_2$ under photochemical conditions.