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Chemistry · PYQ NEET UG 2023

हिन्दी

Which amongst the following will be most readily dehydrated under acidic conditions ?

Question diagram
  1. A
    \( \mathrm{NO_{2}-CH(CH_{3})-CH_{2}-CH(OH)-CH_{3}} \)
  2. B
    \( \mathrm{NO_{2}-CH(CH_{3})-C(OH)(CH_{3})-CH_{2}-OH} \)
  3. C
    \( \mathrm{(CH_{3})_{2}C(OH)-CH_{2}-CH(OH)-CH_{3}} \)
  4. D
    \( \mathrm{NO_{2}-CH_{2}-CH_{2}-CH_{2}-CH(OH)-CH_{3}} \)
View Answer & Solution

Correct answer · Option C

\( \mathrm{(CH_{3})_{2}C(OH)-CH_{2}-CH(OH)-CH_{3}} \)

Explanation

Dehydration under acidic conditions proceeds via carbocation formation. Option (3) contains a diol where one of the hydroxyl groups is tertiary and located near electron-donating methyl groups, forming a very stable tertiary carbocation most readily.
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