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How many sigma and pi bonds are in ethyne, C2H2?
A2 sigma, 3 pi
B3 sigma, 2 pi
C5 sigma, 0 pi
D4 sigma, 1 pi
Answer & Solution
Correct answer: B. 3 sigma, 2 pi
Ethyne has two C–H sigma bonds plus the C–C sigma bond, and the triple bond adds two pi bonds.
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