Write the structural formula of propanone.

Complete the following reaction:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\stackrel{\mathrm{Alkaline} {\mathrm{KMnO}}_4}{\to }$ 

Complete the following reaction:

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}+\mathrm{Na}\to$ 

Complete the following reaction:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}+{\mathrm{O}}_2\to$

(i) What would be observed on adding 5% solution of alkaline potassium permanganate drop by drop to some warm ethanol taken in a test tube? 

(ii) Write the name of the compound formed during the chemical reaction. 

Explain oxidation reaction.