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MHT CET Chemistry General Organic Chemistry 2026 MHT CET 2026 (13 April Shift 2)

MHT CET Chemistry Question (2026) — Solution

Question

Among the following, the most stable carbocation is

Options

  1. A. CH _3^+
  2. B. ( CH _3)_2 CH ^+
  3. C. CH _3 -CH _2^+
  4. D. ( CH _3)_3 C ^+

Answer

D. ( CH _3)_3 C ^+

Step-by-step solution

The stability of carbocations increases with the increase in the number of alkyl groups attached to the positively charged carbon atom. This is due to the +I (inductive) effect and hyperconjugation. The order of stability of alkyl carbocations is 3^ > 2^ > 1^ > methyl . Among the given options, ( CH _3)_3 C ^+ is a tertiary (3^ ) carbocation, which has nine -hydrogen atoms, leading to maximum hyperconjugation structures. Hence, it is the most stable carbocation. Answer: ( CH _3)_3 C ^+

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