Question:medium
Alkenes are formed by heating alcohols with conc. H$_2$SO$_4$. The first step in the reaction is:
Alkenes are formed by heating alcohols with conc. H$_2$SO$_4$. The first step in the reaction is:
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In acid-catalyzed dehydration of alcohols, the first step is protonation, which makes the alcohol a better leaving group.
Updated On: Feb 24, 2026
- formation of carbocation
- formation of ester
- protonation of alcohol molecule
- elimination of water
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The Correct Option is C
Solution and Explanation
Heating alcohols with concentrated H$_2$SO$_4$ initiates with alcohol molecule protonation, forming a carbocation. This carbocation then eliminates water, yielding an alkene. Thus, alcohol molecule protonation is the correct initial step.
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