Ethene is converted to ethanol industrially by reaction with steam in the presence of phosphoric acid at about 300 °C. This reaction is an example of
Ahydrolysis.
Bdehydration.
Chydrogenation.
Dhydration.CORRECT
JUPEBChemistryOrganic Chemistry: Hydrocarbons
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Why the answer is D, and why the others tempt you.
Adding water across a double bond is hydration: CH$_2$=CH$_2$ + H$_2$O → CH$_3$CH$_2$OH. Hydrogenation adds H$_2$, hydrolysis breaks a bond using water, and dehydration is the reverse process, removing water from ethanol to give ethene.
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