Question

Which of the following is a Vinyl halide?

• A. CH$_2$=CH–CHBrCH$_3$
• B. CH$_2$=CH–Br
• C. CH$_2$=CH–CH$_2$CH$_2$Cl
• D. HC≡C–Br

Hint:

Vinyl halides have the general structure R–CH=CH–X, where X is a halogen.

Answer 1

The Correct Option is B

Step 1: Definition.
A vinyl halide is a compound in which the halogen atom is directly attached to a carbon atom of a double bond (C=C).
Step 2: Analysis of options.
(A) CH$_2$=CH–CHBrCH$_3$: Here Br is attached to an alkyl group, not directly to the double bond. Wrong.
(B) CH$_2$=CH–Br: Correct, because Br is directly bonded to the carbon of the C=C double bond.
(C) CH$_2$=CH–CH$_2$CH$_2$Cl: This is an allyl halide, not vinyl.
(D) HC≡C–Br: This is a haloalkyne, not vinyl halide.
Step 3: Conclusion.
The correct answer is (B) CH$_2$=CH–Br.