Compound 'A' (moelcular formula C_(3)H_(8)O) is treated with acidified potassium dichromate to form a product 'B' (molecular formula C_(3)H_(6)O). 'B' forms a shining silver mirror on warming with ammoniacal silver nitrate. 'B' when treated with an aqueous solution of H_(2)NCONHNH_(2). HCl and sodium acetate gives a product 'C'. identify the structure of 'C'.

Compound 'A' (moelcular formula C_(3)H_(8)O) is treated with acidified

1.	Compound 'A' (moelcular formula C_(3)H_(8)O) is treated with acidified potassium dichromate to form a product 'B' (molecular formula C_(3)H_(6)O). 'B' forms a shining silver mirror on warming with ammoniacal silver nitrate. 'B' when treated with an aqueous solution of H_(2)NCONHNH_(2). HCl and sodium acetate gives a product 'C'. identify the structure of 'C'.
Answer» `CH_(3)CH_(2)CH=N NHCONH_2` `CH_(3)-underset(CH_(3))underset(\|)(C)=N NHCONH_(2)` `CH_(3)-underset(CH_(3))underset(\|)(C)=N CONHNH_(2)` `CH_(3)CH_(2)CH=NCONHNH_(2)` Solution :Since (B), M.F. `C_(3)H_(6)O` forms a shining silver mirror on warming with ammonical `AgNO_(3)` (Tollens' reagent), (B) MUST be an aldehyde, i.e., `CH_(3)CH_(2)CHO and 'A'` with M.F. `C_(3)H_(8)O` must be a `1^(@)` alcohol, i.e., `CH_(3)CH_(2)CH_(2)OH`. during the reaction of 'B' with `H_(2)NCONHNH_(2)`. HCl, the more NUCLEOPHILIC `NH_(2)` i.e., `NH_(2)` next to NH reacts GIVING product (C), i.e., option (a) is correct. `underset("1-Propanol (A) "(M.F.C_(3)H_(8)O))(CH_(3)CH_(2)CH_(2)OH) underset(H_(2)SO_(4))overset(K_(2)Cr_(2)O_(7))to underset("PROPANAL (B) "(M.F.C_(3)H_(6)O))(CH_(3)CH_(2)CHO) underset("Sod. acetate "(-HCl,-H_(2)O))overset(H_(2)NCONHNH_(2).HCl)to CH_(3)CH_(2)CH=N NHCONH_(2)`.