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The dehydration of alcohols in the presence of conc. `H_(2)SO_(4)` at `170^(@)C` involves one of the following :
A. free radical intermediate
B. a carbocation ion intermediate
C. expulsion of an `OH^(-)` ion
D. a carbanion intermediate

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Correct Answer - B
Carbocation
`C_(2)H_(5)OH+H^(+) underset(-H_(2)O)rarr CH_(3)-overset(+)(C)H_(2)overset(HSO_(4)^(-))rarr H_(2)C=CH_(2)+H_(2)SO_(4)`

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