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Question

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

A
1butanol
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B
2butanol
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C
2methylpropan2ol
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D
2methylpropan1ol
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Solution

The correct option is C 2methylpropan2ol

Lucas reagent is Anhydrous ZnCl2 + conc.HCl and it gives turbidity immediately with tertiary alcohols.

(CH3)3COH+HCIAnhyd.ZnCl2+HCl−−−−−−−−−−−(CH3)3CCl+H2O
3reacts immediately
(CH3)2CHOH+HCIAnhyd.ZnCl2+HCl−−−−−−−−−−−(CH3)2CHCl+H2O
2reacts after 5 min.
CH3CH2CH2OH+HCIAnhyd.ZnCl2+HCl−−−−−−−−−−−CH3CH2CH2Cl+H2O
1reacts only on heating.


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