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Per NCERT §9.4.1, the C-H bond in ethyne is unusually ACIDIC because of which factor?
AResonance in alkyne
BLone pair on H
Csp hybridisation of carbon
Dsp³ hybridisation of carbon
Answer & Solution
Correct answer: C. sp hybridisation of carbon
NCERT §9.4.1 + 8.2.1: sp has 50% s character, electrons closer to nucleus, so C-H is polar enough that H can leave as H⁺.
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