Write any three mild oxidising agents that are used to distinguish aldehydes from ketones and explain the reactions involved.

$\left(\mathrm{A}\right) {\mathrm{C}}_6{\mathrm{H}}_6 \stackrel{\mathrm{HCl}}{\to } \left(\mathrm{B}\right){\mathrm{C}}_6{\mathrm{H}}_{13}\mathrm{Cl}$

$$\begin{gathered} \left(\mathrm{B}\right)\stackrel{\mathrm{Alcoholic} \mathrm{KOH}}{\to } \left(\mathrm{D}\right), \\ \left(\mathrm{D}\right)\stackrel{\mathrm{Ozonolysis}}{\to } \left(\mathrm{E}\right), \end{gathered}$$

(Negative Fehling's solution test)

$\left(\mathrm{A}\right)\stackrel{\mathrm{Ozonolysis}}{\to } \left(\mathrm{F}\right) + \left(\mathrm{G}\right),$

(Positive Tollen's test for both)

$\left(\mathrm{F}\right) + \left(\mathrm{G}\right)\stackrel{\mathrm{Conc}. \mathrm{NaOH}}{\to } \mathrm{HCOONa} + \mathrm{A}$primary alcohol

Identify the compounds $\left(\mathrm{A}\right)$ to $\left(\mathrm{G}\right)$.