Q. An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide?
A) Methyl iodide
B) Ethyl iodide
C) Ethyl bromide
D) Propyl bromide
Explanation
(d)
In the formation of an alkane from Grignard reagent, alkyl group always comes from Grignard reagent. Hence, the number of carbon atoms in the Grignard reagent and alkane formed Grignard reagent will be identical. So, the original alkyl halide is propyl bromide.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.