An organic compound of molecule formula `C_2H_6O`(A) which is used as an antifreeze when oxidised with `K_2Cr_2O_7//H^(+)` gives compound (B) which is used for making Vinegar . Identify compound (A) and (B) . Write the reactions involved .

An organic compound of molecula formula C_(6)H_(5)O"Na" is heated with CO_(2) at 400 K gives compound (A) of molecular formula C_(7)H_(5)O_(3)Na . Compound (A) on treating with HCl gives (B). B on further reactions wiith NaOH / CaO gives compound (C ) of molecular formula C_(6)H_(6)O which on treatment with nitrous acid at 200 K gives compound (D ). Identify (A), (B) , ( C) and (D) are explain the reactions.

An organic compound (A) with molecular formula C_(2)H_(5)Cl reacts with KOH gives compounds (B) and with alcoholic KOH gives compound (C). Identify (A), (B) and (C).

Compound of molecular formula C_(7)H_(8)O is a sweet smelling liquid. A on reaction with acidified K_(2)Cr_(2)O_(7) gives compound B of molecular formula C_(7)H_(8)O . B reduces Tollen's reagent A and B are respectively.

An organic compound (A) with molecular formula C_(6)H_(7)N gives (B) with HNO_(2)//HCl at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with neutral FeCl3. Identify the compounds A, B and C and write the equations.