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Arrange these in correct order of decrea...

Arrange these in correct order of decreasing reactivity.

A

`I gt II gt III gt IV`

B

`I gt III gt II gt IV `

C

`IV gt III gt II gt I`

D

`IV gt III gt I gt II`

Text Solution

Verified by Experts

The correct Answer is:
C
This problem includes conceptual mixing of carbocation stability and reactivity of alcohol.
Remove the OH group by dehydration and then arrange the carbocation in increasing order of correctly.
Order of carbocation stability is same as `S _(N) 1` reactivity of alkyl halides.
Carbocation stability
The carbocation is formed during reaction of alcohol by removal of OH. More stable the carbocation more will be its reactivity of carbocation formed during reaction are as follows

Benzyl carbocation is more stable due to conjugation with phenyl ring.
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