When treated with Lucas reagent (concentrated and anhydrous ) at room temperature, which alcohol produces turbidity immediately?
Answer and explanation
Correct answer: C. 2-Methylpropan-2-ol
- Step 1: Lucas reagent converts alcohols to insoluble alkyl chlorides via a carbocation intermediate.
- Step 2: Tertiary alcohols () react immediately producing cloudiness/turbidity at room temperature.
- Step 3: 2-Methylpropan-2-ol is a tertiary alcohol and reacts immediately.
Answer
2-Methylpropan-2-ol.
Why not the others: 2-Propanol is secondary and produces turbidity within 5 minutes; ethanol and 1-propanol are primary and produce no turbidity at room temperature unless heated.
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