Write notes on Victor Meyer's method for distinction of different classes of alcohols.

What happens when primary, secondary and tertiary alcohols are

i) oxidised with ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ and ${\mathrm{H}}_2{\mathrm{SO}}_4$?

ii) passed over heated copper?

How can you distinguish between primary, secondary and tertiary alcohol by oxidation method? 

Write the principle of manufacture of ethyl alcohol from starchy materials.