The alcohol that produces turbidity immediately with Lucas reagent at room temperature

1 - b u t a n o l

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2 - b u t a n o l

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2 - m e t h y l p r o p a n - 2 - o l

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2 - m e t h y l p r o p a n - 1 - o l

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Solution

The correct option is C $2 - m e t h y l p r o p a n - 2 - o l$
Lucas reagent is Anhydrous $Z n C l_{2} + c o n c . H C l$ and it gives turbidity immediately with tertiary alcohols.

${(C H_{3})}_{3} C - O H + H C I A n h y d . Z n C l_{2} + H C l - ----------- \to (C H_{3})_{3} C - C l + H_{2} O$
$3^{\circ} r e a c t s i m m e d i a t e l y$
${(C H_{3})}_{2} C H - O H + H C I A n h y d . Z n C l_{2} + H C l - ----------- \to (C H_{3})_{2} C H - C l + H_{2} O$
$2^{\circ} r e a c t s a f t e r 5 m i n .$
$C H_{3} C H_{2} C H_{2} - O H + H C I A n h y d . Z n C l_{2} + H C l - ----------- \to C H_{3} C H_{2} C H_{2} - C l + H_{2} O$
$1^{\circ} r e a c t s o n l y o n h e a t i n g .$

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Z n C l_{2} / C o n c . H C l

Z n C l_{2}

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