Identify product '$$\mathrm{B}$$' in following reaction.

Cumene $$\xrightarrow[\Delta]{\mathrm{KMnO}_4, \mathrm{KOH}} \mathrm{A} \xrightarrow{\mathrm{H}_3 \mathrm{O}+} \mathrm{B}$$

Which of the following alkenes on oxidation by $$\mathrm{KMnO}_4$$ in dil. $$\mathrm{H}_2 \mathrm{SO}_4$$ forms adipic acid?

Identify the product 'P' of following reaction.

Ethanoyl chloride $$\buildrel {{H_2}O} \over \longrightarrow $$ P

Identify compound $$\mathrm{A}$$ used in following reaction.

Benzoic acid $$\underset{\Delta}{\stackrel{A}{\longrightarrow}}$$ Benzoyl chloride + Phosphorous oxychloride + Hydrogen chloride