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Question

Arrange Ethane, Ethene and Ethyne in decreasing order of the bond strength between the two carbon atoms in the given hydrocarbons.



A

Ethene > Ethane > Ethyne

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B

Ethane  > Ethene > Ethyne

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C

Ethyne = Ethene = Ethane

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D

Ethyne > Ethene > Ethane

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Solution

The correct option is D

Ethyne > Ethene > Ethane


As the number of shared electrons increases, the bond strength increases. 

In a triple bond, a total of 6 electrons are shared. In a double bond, 4 electrons are shared and in a single bond, only 2 electrons are shared. Thus, the order is as follows:

Ethyne > Ethene > Ethane.


Chemistry

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