Assertion: The major product obtained in the reaction of HBr with propene is 2-bromopropane.
Reason : `2^@` carbocations are more stable than `1^@` carbocations.
a. If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
b.f both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.
c.Assertion is CORRECT but Reason is INCORRECT.
d.If Assertion is INCORRECT but Reason is CORRECT.

Options

A. If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
B. If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.
C. I Assertion is CORRECT but Reason is INCORRECT.
D. If Assertion is INCORRECT but Reason is CORRECT.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that the major product obtained in the reaction of HBr with propene is 2-bromopropane.

- **Propene (C3H6)** has a double bond between the first and second carbon atoms: CH3-CH=CH2.
- When propene reacts with HBr, the H+ ion can add to one of the carbon atoms in the double bond, leading to the formation of a carbocation.

### Step 2: Identify the Possible Carbocations
There are two possible carbocations that can form during the reaction:

1. **Primary Carbocation:**
- If H+ adds to the terminal carbon (C1), it forms a primary carbocation: CH3-CH2-CH2+ (less stable).

2. **Secondary Carbocation:**
- If H+ adds to the middle carbon (C2), it forms a secondary carbocation: CH3-CH+-CH3 (more stable).

### Step 3: Stability of Carbocations
The reason states that secondary carbocations are more stable than primary carbocations.

- **Stability Factors:**
- **Inductive Effect:** Secondary carbocations are stabilized by the electron-donating effect of the adjacent carbon atoms.
- **Hyperconjugation:** Secondary carbocations can undergo hyperconjugation with more hydrogen atoms (3 from CH3 groups) compared to primary carbocations (only 1 from CH2).

### Step 4: Major Product Formation
Since the secondary carbocation is more stable, it is the favored intermediate in the reaction. Therefore, when the bromide ion (Br-) attacks the secondary carbocation, the major product formed is 2-bromopropane (CH3-CHBr-CH3).

### Conclusion
Both the assertion and the reason are correct, and the reason correctly explains why the assertion is true.

Thus, the correct answer is:
**a. If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.**

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