(i) Mechanism of hydration of ethene to ethanol
Step-I: Protonation of alkene
![](https://www.sarthaks.com/?qa=blob&qa_blobid=1052009188401456076)
Step-II: Nucleophilic attack of water as carbocation
![](https://www.sarthaks.com/?qa=blob&qa_blobid=202497431620281669)
Step-III: Deprotonation of alcohol
![](https://www.sarthaks.com/?qa=blob&qa_blobid=17579659587733830231)
(ii) Mechanism of dehydration of ethanol to ethene.
Step-I: Formation of protonated alcohol
![](https://www.sarthaks.com/?qa=blob&qa_blobid=4896463413544617510)
Step–II: Formation of carbocation
![](https://www.sarthaks.com/?qa=blob&qa_blobid=5101883759683957335)
Setp-III. Formation of ethene
![](https://www.sarthaks.com/?qa=blob&qa_blobid=5953635992479215168)