An organic compound Aof molecular formula CH_2O reacts with methyl magnesium iodide followed by acid hydrolysis to give B of molecular formula C_2H_6O. B on reaction with PCl_4 gives C . C on reaction with alcoholic KOH gives D an alkeneas the product. IdentifyA, B ,C ,D and explain the reactions involved.

An organic compound Aof molecular formula CH_2O reacts with methyl mag

1.	An organic compound Aof molecular formula CH_2O reacts with methyl magnesium iodide followed by acid hydrolysis to give B of molecular formula C_2H_6O. B on reaction with PCl_4 gives C . C on reaction with alcoholic KOH gives D an alkeneas the product. IdentifyA, B ,C ,D and explain the reactions involved.
Answer» Solution :(i) A of molecular formula `CH_2 O`is identified as HCHO, FORMALDEHYDE . (II) Formaldehyde reacts with `CH_3MgI` followed by hydrolysis to give ethanol, `CH_3 - CH_2 OH` B as the product. (ii) Ethanol B react with `PCl_5` to give `C_2H_5Cl`, Ethyl CHLORIDE C as the product. `underset("Ethanol")(CH-3-CH_2OH) + PCl_5 overset(KOH)to underset("Ethyl chloride C")(CH_3 - CH_2Cl+ POCl_3 + HCl)` (iv) `CH_3- CH_2 Cl` C on reaction with ALCOHOLIC KOH undergoes dehydrohalogenation to give ethylene `CH_2 = CH_2` D as the product. `CH_3 - CH_2 Cl underset(KOH)overset("alcoholic")to underset("Ethylene")(CH_2 = CH_2) + HCl`