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Question

What is the nature of the carbon-carbon bond(s) in the compound formed when concentrated H2SO4 dehydrates ethanol?

A
Single bond
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B
Double bond
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C
Triple bond
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D
No bonds exist
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Solution

The correct option is B Double bond
Heating ethanol with hot concentrated sulphuric acid results in the dehydration (removal of water) of ethanol to give ethene.

Therefore, a double bond exists between the two carbon atoms.

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