Which of the following gives turbidity immediately with the Lucas reagent ( $ZnCl X_{2}$ /conc. $HCl$ ) at room temperature?

Abutan-2-ol
Bethanol
C2-methylpropan-2-ol
Dbutan-1-ol

Answer: C

Tertiary alcohols form the stable tertiary carbocation fastest, so the insoluble tertiary chloride appears at once. Secondary alcohols take about 5 minutes and primary alcohols give no turbidity at room temperature.

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Which of the following gives turbidity immediately with the Lucas reagent (ZnClX2​/conc. HCl) at room temperature?

Answer: C

More questions on Distinguishing tests

Which of the following gives turbidity immediately with the Lucas reagent ( $ZnCl X_{2}$ /conc. $HCl$ ) at room temperature?