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Question


2) H2C=CH−CH2−+CH−CH3

3) H3C−CH3|C|CH3−+CH2
Write these carbocations in decreasing order of their stabilities.
1071658_fe639d35f99a47799a794abab95eb818.png

A
I>II>III
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B
II>III>I
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C
III>I>II
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D
I>III>II
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Solution

The correct option is A I>II>III
The stability of carbocations will be according to the following order I>II>III

In II there are 5 alpha hydrogens will show hyperconjugation, so II is more stable than III.

As,benzyl carbocation is the most stable due to resonance and primary carbocation is the least stable.

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