Question:
Which of the following alcohols is NOT prepared by acid-catalyzed hydration of alkenes?
Which of the following alcohols is NOT prepared by acid-catalyzed hydration of alkenes?
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Acid-catalyzed hydration of alkenes follows Markovnikov’s rule, where the hydroxyl group adds to the more substituted carbon.
Updated On: Jan 26, 2026
- Ethanol
- Propan-2-ol
- Propan-1-ol
- 2-Methyl propan-2-ol
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The Correct Option is C
Solution and Explanation
Step 1: Identifying the preparation method.
Acid-catalyzed hydration of alkenes typically results in the formation of alcohols where the hydroxyl group (-OH) adds to the more substituted carbon. This leads to the formation of the Markovnikov product.
Step 2: Analyzing the options.
(A) Ethanol: Ethanol is formed by acid-catalyzed hydration of ethene.
(B) Propan-2-ol: Propan-2-ol is formed by acid-catalyzed hydration of propene.
(C) Propan-1-ol: Incorrect — Propan-1-ol is not the product of acid-catalyzed hydration of alkenes, as it would be the anti-Markovnikov product, which requires a different mechanism.
(D) 2-Methyl propan-2-ol: This is formed by acid-catalyzed hydration of isobutene.
Step 3: Conclusion.
The correct answer is (C) Propan-1-ol.
Acid-catalyzed hydration of alkenes typically results in the formation of alcohols where the hydroxyl group (-OH) adds to the more substituted carbon. This leads to the formation of the Markovnikov product.
Step 2: Analyzing the options.
(A) Ethanol: Ethanol is formed by acid-catalyzed hydration of ethene.
(B) Propan-2-ol: Propan-2-ol is formed by acid-catalyzed hydration of propene.
(C) Propan-1-ol: Incorrect — Propan-1-ol is not the product of acid-catalyzed hydration of alkenes, as it would be the anti-Markovnikov product, which requires a different mechanism.
(D) 2-Methyl propan-2-ol: This is formed by acid-catalyzed hydration of isobutene.
Step 3: Conclusion.
The correct answer is (C) Propan-1-ol.
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