The compound formed when ethyl alcohol is treated with conc. $H_{2} {S O}_{4}$ at $170^{o} C$ is _______.

ethane

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ethene

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ethyne

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ethanal

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Solution

The correct option is A ethene
$E t h a n o l$ can be dehydrated to give $e t h e n e$ by heating it with an excess of concentrated sulphuric acid at about 170C.
$C H_{3} C H_{2} - O H C o n c . H_{2} S O_{4} 170^{o} C \to C H_{2} = C H_{2} + H_{2} O$

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