Ketone $\mathrm{P}$ (having minimum molar mass) on reaction with ${\mathrm{NH}}_2\mathrm{OH}$ form two oxime $\mathrm{Q}$ and $\mathrm{R}$ that are geometrical isomer $\mathrm{P}$ contain only $\mathrm{C},\mathrm{H}$ and $\mathrm{O}$ )

The difference in molar mass of Acid I and II is

1. Aliphatic amines preparations and properties:

2. Aniline preparations and properties:

3. Diazonium salt Preparations:

4. Chemical Properties of Diazonium salt:

(i) Nucleophilic substitution reactions:

(ii) Coupling reactions:

(iii) Formation of Methyl Orange: