Question:
An unknown alcohol is treated with "Lucas reagent" to determine whether the alcohol is primary, secondary, or tertiary. Which alcohol reacts fastest and by what mechanism?
An unknown alcohol is treated with "Lucas reagent" to determine whether the alcohol is primary, secondary, or tertiary. Which alcohol reacts fastest and by what mechanism?
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Lucas reagent test works on carbocation stability, making tertiary alcohols the fastest-reacting.
Updated On: Mar 25, 2025
- Secondary alcohol by SN₁
- Tertiary alcohol by SN₁
- Secondary alcohol by SN₂
- Tertiary alcohol by SN₂
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The Correct Option is B
Solution and Explanation
Step 1: Understanding Lucas Test
- Lucas test differentiates alcohols based on their reaction with ZnCl2/HCl.
Step 2: Order of Reactivity
- Tertiary alcohols react fastest via the SN1 mechanism.
Final Answer: Tertiary alcohol via SN1.
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