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Question

The compound which gives the most stable carbonium ion on protonation followed by loss of water is:

A
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B
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C
CH3CH2CH2CH2OH
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D
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Solution

The correct option is B
The order of stability of carbonium ion is
tertiary > secondary > primary > methyl
Tertiary carbonium ion (formed in b ) are more stable because of electron donating (+I effect) nature of CH3 group due to which the +ve charge gets dispresed and also due to hyperconjugation. Hence b gives the most stable carbonium ion on dehydration.

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