Question

Identify (P)

• A.
• B.
• C.
• D.

Hint:

Zn/$\Delta$ converts vicinal dihalides into alkenes via elimination. Markovnikov addition of HBr to 1-methylcycloalkenes yields 1-bromo-1-methylcycloalkanes.

Answer 1

The Correct Option is A

To solve the given question, let's analyze the chemical reaction step by step.

The starting compound is a dibromo cyclopentane. The reaction involves two steps:

1. Step 1: Dehalogenation using Zinc (Zn)

   In the presence of zinc and heat (∆), the bromo groups undergo dehalogenation. Zinc serves as a reducing agent, which removes the bromine atoms, resulting in the formation of a cyclopentene via an elimination reaction.

2. Step 2: Addition of HBr

   After the formation of the cyclopentene, hydrogen bromide (HBr) is added. The addition of HBr follows Markovnikov’s rule, where the hydrogen atom attaches to the carbon with more hydrogen atoms, and the bromine attaches to the more substituted carbon atom.

   This results in the formation of the major product indicated by (P).

Let's verify the correct option from the given choices.

This indicates the major product after the dehalogenation and subsequent addition of HBr, confirming the correct answer.

Conclusion: The major product (P) of the reaction is correctly identified as depicted in the correct answer choice image.