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.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More alcohols Practice Questions
Mild oxidation of a primary alcohol with pyridinium chlorochromate stops at one stage, so what is th...
Mild oxidation of a primary alcohol with pyridinium chlorochromate stops at one stage, so what is th...
Heating four isomeric butanols with concentrated sulphuric acid gives alkenes at very different rate...
Heating four isomeric butanols with concentrated sulphuric acid gives alkenes at very different rate...
When three unlabelled bottles containing 1-butanol, 2-butanol and 2-methyl-2-propanol are each treat...
When three unlabelled bottles containing 1-butanol, 2-butanol and 2-methyl-2-propanol are each treat...
Converting a primary alcohol into the corresponding chloroalkane using thionyl chloride is often pre...
Converting a primary alcohol into the corresponding chloroalkane using thionyl chloride is often pre...
When 4.6 g of ethanol reacts completely with excess sodium metal, the volume of H2 gas evolved at ST...
When 4.6 g of ethanol reacts completely with excess sodium metal, the volume of H2 gas evolved at ST...
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.
Looking for more practice? Explore all chemistry questions or browse organic compounds containing oxygen questions on RankGuru.