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Per NCERT §9.4 (structure), the C-H bond in ethyne has shorter bond length than that in ethane because of which reason?
ALess s character in sp hybrid
BMore s character in sp hybrid
CLarger size of sp orbital
DMore p character in sp hybrid
Answer & Solution
Correct answer: B. More s character in sp hybrid
NCERT §8.2.1: sp has 50% s character vs 25% for sp³; greater s character pulls electrons closer to nucleus, shortening the C-H bond.
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