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Question

The correct order of dehydration of following alcohol is:


A
a<b<c<d
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B
d>c>a>b
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C
d>b>a>c
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D
a>c>d>b
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Solution

The correct option is C d>b>a>c
Phenol is stable aromatic compound. So, it is more stable. The diene (d) undergoes quick dehydration because it will form stable benzene. The alkene (c) undergoes dehydration less readily because it gives a more stable diene. Alcohol undergoes much lesser dehydration to form alkene.


Phenol on dehydration becomes unstable.

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