Question:
Which of the following reagents can bring about the following conversion?
But-1-ene $\xrightarrow{}$ Butan-2-ol
Which of the following reagents can bring about the following conversion?
But-1-ene $\xrightarrow{}$ Butan-2-ol
But-1-ene $\xrightarrow{}$ Butan-2-ol
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For hydration of alkenes, sulfuric acid followed by hydrolysis with water gives alcohols, following Markovnikov's rule.
Updated On: Feb 18, 2026
- H$_2$O$_2$
- KOH aqueous
- (i) cold Conc. H$_2$SO$_4$, (ii) H$_2$O
- B$_2$H$_6$
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the reaction.
The given reaction involves the hydration of an alkene (but-1-ene) to form an alcohol (butan-2-ol). This reaction typically proceeds through the acid-catalyzed hydration of alkenes.
Step 2: Analyzing the options.
(A) H$_2$O$_2$: Hydrogen peroxide is not suitable for this transformation as it does not catalyze the hydration of alkenes.
(B) KOH aqueous: Potassium hydroxide in aqueous solution typically induces elimination reactions, not hydration.
(C) (i) cold Conc. H$_2$SO$_4$, (ii) H$_2$O: This is the correct answer. Cold concentrated sulfuric acid adds to the alkene, and hydrolysis with water results in the formation of butan-2-ol.
(D) B$_2$H$_6$: Diborane is used in hydroboration-oxidation reactions, but this is not the correct reagent for this specific transformation.
Step 3: Conclusion.
The correct answer is (C) (i) cold Conc. H$_2$SO$_4$, (ii) H$_2$O.
The given reaction involves the hydration of an alkene (but-1-ene) to form an alcohol (butan-2-ol). This reaction typically proceeds through the acid-catalyzed hydration of alkenes.
Step 2: Analyzing the options.
(A) H$_2$O$_2$: Hydrogen peroxide is not suitable for this transformation as it does not catalyze the hydration of alkenes.
(B) KOH aqueous: Potassium hydroxide in aqueous solution typically induces elimination reactions, not hydration.
(C) (i) cold Conc. H$_2$SO$_4$, (ii) H$_2$O: This is the correct answer. Cold concentrated sulfuric acid adds to the alkene, and hydrolysis with water results in the formation of butan-2-ol.
(D) B$_2$H$_6$: Diborane is used in hydroboration-oxidation reactions, but this is not the correct reagent for this specific transformation.
Step 3: Conclusion.
The correct answer is (C) (i) cold Conc. H$_2$SO$_4$, (ii) H$_2$O.
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