An organic compound (A) having moleclar formula C_(2)H_(6)O on oxidation with Na_(2)Cr_(2)O_(7)//H_(2)SO_(4) produces a compound (B) which reduces Tollens' reagent. Both (A) and (B) produce a yellow soli on treatment with I_(2)//OH^(-). Identify (A) and (B).

An organic compound (A) having moleclar formula C_(2)H_(6)O on oxidati

1.	An organic compound (A) having moleclar formula C_(2)H_(6)O on oxidation with Na_(2)Cr_(2)O_(7)//H_(2)SO_(4) produces a compound (B) which reduces Tollens' reagent. Both (A) and (B) produce a yellow soli on treatment with I_(2)//OH^(-). Identify (A) and (B).
Answer» Solution :(i) Since an organic compound (A) with M.F. `C_(2)H_(6)O` on oxidation with `Na_(2)Cr_(2)O_(7)//H_(2)SO_(4)` gives compound (B) which reduces Tollens' reagent, therefore (A) must be ETHANOL and (B) must be ETHANAL (B). `underset("Ethanol (A) "M.F.C_(2)H_(6)O)(CH_(3)CH_(2)OH) underset(("Oxidation"))overset(Na_(2)Cr_(2)O_(7)//H_(2)SO_(4))to underset("Ethanal (B)")(CH_(3)CHO)` (ii) Since ethanol (A), `CH_(3)CH_(2)OH` contains the grouping `CH_(3)CHOH-` and ethanal (B), `CH_(3)CHO` contain the grouping `CH_(3)CO-`, herefore, both these on TREATMENT with `I_(2)//OH^(-)` undergo iodoform REACTION to give yellow solid of iodoform. `underset("Ethanol (A)")(CH_(3)CH_(2)OH)` or `underset("Ethanal (B)")(CH_(3)CHO) underset(("Iodoform reaction"))overset(I_(2)//OH^(-))to underset("Iodoform (Yellow solid)")(CHI_(3))`.