The incorrect statement regarding ethyne is

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(D) In ethyne $(HC \equiv CH)$,the carbon-carbon bond is a triple bond,which is shorter and stronger than the double bond in ethene $(CH_2=CH_2)$.Ethy

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The carbon-carbon bond in ethyne is weaker than that in ethene

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(D) In ethyne $(HC \equiv CH)$,the carbon-carbon bond is a triple bond,which is shorter and stronger than the double bond in ethene $(CH_2=CH_2)$.Ethyne is a linear molecule where both carbon atoms are $sp$ hybridised.Therefore,the statement that the carbon-carbon bond in ethyne is weaker than that in ethene is incorrect.

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