Question

Propene $\stackrel{\text{ HBr }}{\to }A\underset{\text{ (ii) }{H}_{2}O/\text{ boil }}{\overset{\text{ (i) }Mg/\text{ ether }}{\to }}B$
In the above sequence of reactions $B$ is

• A. propane
• B. butane
• C. propene
• D. ethane

Answer 1

Answer: (A)

Grignard's reagent on reaction with any compound containing active $H$-atom decompose to give alkane
(when $H$-atom is attached to $O,N$ or $S$ or acidic in nature is known as active $H$-atom).