An alkyl halide by formation of its Grignard reagent and heating with water gives propane. What is the original alkyl halide ?

An alkyl halide by formation of its Grignard reagent and heating with

1.	An alkyl halide by formation of its Grignard reagent and heating with water gives propane. What is the original alkyl halide ?
Answer» methyl iodide ethyl iodide ethyl bromide propyl bromide Solution :`UNDERSET"Propyl bromide"(CH_3CH_2CH_2Br)overset"Mg/ether"to underset"Gringnard REAGENT"(CH_3CH_2CH_2MgBr)underset"-Mg(OH)Br"overset(H_2O, DELTA)to underset"PROPANE"(CH_3CH_2CH_3)`