Question

Energy required to break c ≡ c bond in acetylene is _____ than required to break c-c bond in ethane.

Answer 1

Answer:

In the series ethane, ethylene and acetylene, the C−H bond energy is highest for acetylene. This due to more electronegativity of carbon atoms in acetylene as it undergoes sp hybridization. As the s character is hybridization increases the electronegativity of the atom increases and hence bond energy also increases.

Hence option D is correct.

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