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Which of the following compounds reacts fastest with Lucas reagents?

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n-propyl carbinol

ethyl methyl carbinol

trimethyl carbinol

isopropyl carbinol

answer is C.

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Detailed Solution

Alcohols are soluble in Lucas reagent(conc. $H C l$ and $Z n C l_{2}$ ) while their halides are immiscible and produce turbidity in solution.

In case of tertiary alcohols turbidity produce immediately while primary alcohols do not.

So Rate of reaction with Lucas reagent is : $3^{0} > 2^{0} > 1^{0}$ .

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