1(vi)
Conversion of Ethanol to Ethene by the action of concentrated sulphuric acid involves:
- (a)Dehydration
- (b)Dehydrogenation
- (c)Dehydrohalogenation
- (d)Hydrolysis
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Dehydration
Reason — Dehydration involves elimination of elements of water from alcohol. Conc. sulphuric acid act as dehydrating agent.
$\underset{\text{ ethyl alcohol}}{\text{C}_2\text{H}_5\text{OH}} \xrightarrow[170^{\circ}\text{C}]{\text{Conc. H}_2\text{SO}_4\text{[excess]}} \underset{ \text{ethene}}{\text{C}_2\text{H}_4} + \text{H}_2\text{O}\$
The products formed are ethene and water.