Q on treatment with ethanol generates an aromatic aldehyde.

S gives positive phthalein dye test.

P is a dinitro compound.

T is a coloured compound.

Both X and Y are oxygen containing compounds.

Y on heating with CHCl$_3$/KOH forms isocyanide.

Z reacts with Hinsberg’s reagent.

Z is an aromatic primary amine.

i) Lindlar's catalyst, $\mathrm{H}_2$;

ii) $\mathrm{SnCl}_2 / \mathrm{HCl}$;

iii) $\mathrm{NaBH}_4$;

iv) $\mathrm{H}_3 \mathrm{O}^{+}$

i) Lindlar's catalyst, $\mathrm{H}_2$;

ii) $\mathrm{H}_3 \mathrm{O}^{+}$;

iii) $\mathrm{SnCl}_2 / \mathrm{HCl}$;

iv) $\mathrm{NaBH}_4$

i) $\mathrm{NaBH}_4$;

ii) $\mathrm{SnCl}_2 / \mathrm{HCl}$;

iii) $\mathrm{H}_3 \mathrm{O}^{+}$;

iv) Lindlar's catalyst, $\mathrm{H}_2$

i) Lindlar's catalyst, $\mathrm{H}_2$;

ii) $\mathrm{NaBH}_4$;

iii) $\mathrm{SnCl}_2 / \mathrm{HCl}$;

iv) $\mathrm{H}_3 \mathrm{O}^{+}$