The alcohol that produces turbidity immediately with Lucas reagent at room temperature Options: A . &nbsp1−butanol B . &nbsp2−butanol C . &nbsp2−methylpropan−2−ol D . &nbsp2−methylpropan−1−ol

Answer: Option C : C 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 − −−−−−−−−−−− → ( C H 3 ) 3 C − C l + H 2 O 3 ∘ 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 − −−−−−−−−−−− → ( C H 3 ) 2 C H − C l + H 2 O 2 ∘ 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 − −−−−−−−−−−− → C H 3 C H 2 C H 2 − C l + H 2 O 1 ∘ r e a c t s o n l y o n h e a t i n g .

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

Question

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

Options:

A . 1−butanol

B . 2−butanol

C . 2−methylpropan−2−ol

D . 2−methylpropan−1−ol

Answer: Option C
:
C
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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