Question

The false statements among the following are I. A primary carbocation is less stable than a tertiary carbocation.
II. A secondary propyl carbocation is less stable than allyl carbocation.
III. A tertiary free radical is more stable than a primary free radical.
IV. Isopropyl carbocation is more stable than ethyl carbocation.

• A. I and II
• B. II and III
• C. I and IV
• D. II and IV

Hint:

Carbocation stability increases with the number of alkyl groups attached to the positively charged carbon. Tertiary carbocations are more stable than secondary, which are more stable than primary.

Answer 1

The Correct Option is C

The false statements are: - Statement I: A primary carbocation is less stable than a tertiary carbocation. This is false because a tertiary carbocation is more stable due to alkyl groups providing inductive and hyperconjugative stabilization. - Statement IV: Isopropyl carbocation is more stable than ethyl carbocation. This is false because ethyl carbocation is more stable than isopropyl carbocation, as the inductive effects of alkyl groups play a role.