Question:
Which of the following alcohols is prepared by acid catalysed hydration of alkenes?
Which of the following alcohols is prepared by acid catalysed hydration of alkenes?
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Acid catalysed hydration of alkenes generally gives Markovnikov alcohols.
Updated On: Feb 2, 2026
- Ethanol
- Methanol
- Propan-1-ol
- Butan-1-ol
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The Correct Option is A
Solution and Explanation
Step 1: Understanding acid catalysed hydration.
Acid catalysed hydration of alkenes involves the addition of water across the double bond in the presence of an acid catalyst such as $\mathrm{H_2SO_4}$. This reaction generally follows Markovnikov’s rule.
Step 2: Application to ethene.
When ethene undergoes acid catalysed hydration, water adds across the double bond to form ethanol as the product.
Step 3: Analysis of other options.
Methanol is not prepared by hydration of alkenes. Propan-1-ol and butan-1-ol are not obtained directly by acid catalysed hydration due to rearrangement and Markovnikov addition leading to secondary alcohols instead.
Step 4: Conclusion.
Therefore, the correct answer is (A) Ethanol.
Acid catalysed hydration of alkenes involves the addition of water across the double bond in the presence of an acid catalyst such as $\mathrm{H_2SO_4}$. This reaction generally follows Markovnikov’s rule.
Step 2: Application to ethene.
When ethene undergoes acid catalysed hydration, water adds across the double bond to form ethanol as the product.
Step 3: Analysis of other options.
Methanol is not prepared by hydration of alkenes. Propan-1-ol and butan-1-ol are not obtained directly by acid catalysed hydration due to rearrangement and Markovnikov addition leading to secondary alcohols instead.
Step 4: Conclusion.
Therefore, the correct answer is (A) Ethanol.
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