Draw the structures of the following compounds : $\mathrm{p}$-Nitropropiophenone.

Draw the structures of the following compounds : $\mathrm{p}$-methylbenzaldehyde

Draw the structures of the following compounds : $\mathrm{p}, \mathrm{p}$-Dihydroxybenzophenone

Arrange the following in the increasing order of boiling points:

(i) Acetaldehyde (ii) Acetic acid (iii) Ethyl alcohol (iv) ${\mathrm{CH}}_3{\mathrm{OCH}}_3$ (v) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3$.