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Question

The reaction of ethanol with conc. H2SO4 gives :

A
ethane
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B
ethene
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C
ethyne
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D
ethanoic acid
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Solution

The correct option is B ethene
Ethanol can be dehydrated to give ethene by heating it with an excess of concentrated sulphuric acid at 1700C. The acid catalysts normally used in alcohol dehydration is concentrated sulphuric acid which results in alkene.
C2H5OH+conc.H2SO4C2H4+H2O

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