Alcohols
An unknown alcohol gives immediate turbidity with Lucas reagent at room temperature. The alcohol is most likely:
Select the correct option:
Solution
2-Methylpropan-2-ol
Lucas reagent (conc. HCl + anhydrous ZnCl2) converts alcohols to alkyl chlorides. Tertiary alcohols react instantly because they form the most stable carbocation intermediate. Hence immediate turbidity indicates a tertiary alcohol, i.e., 2-methylpropan-2-ol.
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About This Question
- Subject
- chemistry
- Chapter
- organic compounds containing oxygen
- Topic
- alcohols
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
2-Methylpropan-2-ol
Lucas reagent (conc. HCl + anhydrous ZnCl2) converts alcohols to alkyl chlorides. Tertiary alcohols react instantly because they form the most stable carbocation intermediate. Hence immediate turbidity indicates a tertiary alcohol, i.e., 2-methylpropan-2-ol.
This easy difficulty chemistry question is from the chapter organic compounds containing oxygen, covering the topic of alcohols. It appeared in the 2025 exam.
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