Question

Out of ethene and ethyne which will have high bond dissociation energy ? why ?​

Answer 1

In ethyne due to presence of triple bond, electron density is very high so it is more reactive than ethane.

So as the percentage s character increases, the hybrid orbital holds the electron closer to the nucleus and the bond becomes shorter and stronger. Thus the C-H bond is strongest in acetylene, thus the C-H bond energy will be greatest in acetylene. Hence option d is the correct answer

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Answer 2

Answer:

ethyne has high bond dissociation energy because in ethyne triple bond is present and it makes it unstable hence bond dissociate easily