$Z$ is an aromatic compound with substituents $P$ and $Q$. What are $P$ and $Q$ ?
$Z$ is an aromatic compound with substituents $P$ and $Q$. What are $P$ and $Q$ ?
$-\mathrm{OH},-\mathrm{SO}_3 \mathrm{H}$
$-\mathrm{CHO},-\mathrm{NO}_2$
$-\mathrm{SO}_3 \mathrm{H}_1-\mathrm{NO}_2$
$-\mathrm{COOH},-\mathrm{NO}_2$
Solution
When 2-methylhexane reacts with chromic oxide, toluene (compound $X$ ) is formed. Further it reacts with $\mathrm{KMnO}_4$ to form benzoic acid (compound $Y$ ) which on reaction with nitric and sulphuric acid forms $m$-nitro benzoic acid (compound $Z$ ). Therefore, $P$ and $Q$ are $-\mathrm{COOH}$ and $\mathrm{NO}_2$ respectively.
