A) three pi bonds
B) one sigma and two pi bonds
C) two sigma and one pi bonds
D) three sigma bonds
Correct Answer: B
Solution :
The structure of acetylene is \[H-C\overset{1\,\,\sigma }{\mathop{\underset{2\,\pi }{\mathop{\equiv }}\,}}\,C-H\] Hence, in acetylene molecule, there are one sigma and two pi bonds are present between carbon atoms.
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