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Q.

Among the following alcohols which would react fastest with Lucas reagent and by what mechanism

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a

2- pentanol by SN2

b

2-methyl butan -2-ol by SN1

c

1-Pentanol by SN2

d

2-methyl butanol by SN1

answer is D.

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Detailed Solution

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Tertiary alcohols gives immediate turbidity with Lucas reagent. It forms a stable carbocation, hence follows SN1  mechanism.
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