The alcohol that produces turbidity immediately with $Z n C l_{2}$ and conc. $H C l$ at room temperature is:

butanol

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butan-2-ol

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2-methylpropan-2-ol

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2-methylpropanol

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Solution

The correct option is A 2-methylpropan-2-ol
The Lucas reagent $(H C l + Z n C l_{2})$ reacts most rapidly with tertiary alcohols due to its ability to form tertiary carbocation with ease and this is the reason that it produces turbidity immediately.

Therefore, $2$ -methylpropan- $2$ -ol is the correct answer.

Option C is correct.

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