The alcohol that produces turbidity immediately with Lucas reagent at room temperature Options: A . &nbsp 1 − b u t a n o l B . &nbsp 2 − b u t a n o l C . &nbsp 2 − m e t h y l p r o p a n − 2 − o l D . &nbsp 2 − m e t h y l p r o p a n − 1 − o l

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 tem

Discussion Forum : Alcohols Phenols And Ethers

Question -

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

Options:

A .

1 - b u t a n o l

B .

2 - b u t a n o l

C .

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

D .

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

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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