Which of the following gives ethene when heated with conc. sulphuric acid?

C H_{3} C H O

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C H_{3} C O O H

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C H_{3} O H

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C H_{3} C H_{2} O H

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Solution

The correct option is C $C H_{3} C H_{2} O H$
$C H_{2} C H_{2} O H Δ, c o n c . H_{2} S O_{4} - -------- \to C H_{2} = C H_{2} + H_{2} O$
Conc. sulphuric acid is a dehydrating agent which removes water from ethanol.

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