Q. Oxidation of organic compound $'A'$ with $Na_2Cr_2O_7$ and $H_2SO_4$ gives compound $'B'$, which on reduction with $H_2$ in the presence of Ni catalyst gives ethyl alcohol. Give the name of compound $'A'$.
Gujarat CETGujarat CET 2008Alcohols Phenols and Ethers
Solution:
$ A \xrightarrow[{[O]}]{Na_2Cr_2O_7 / H_2SO_4} B \xrightarrow{H_2 / Ni}$ Ethyl alcohol
Compound Bon reduction with $H_2$ in the presence of Ni gives ethyl alcohol, it means compound B is ethanal or ethanoic acid; because aldehyde or acid on reduction gives primary alcohol.
Again, compound B is obtained by the oxidation of A, it means A is ethanol, because primary alcohol on oxidation gives aldehyde or acid.
