A) one sigma-bond and two pi-bonds
B) two sigma-bonds and one pi-bond
C) three sigma-bonds
D) three pi-bonds
Correct Answer: A
Solution :
In acetylene molecule, both carbon are sp-hybrid. The two unpaired p-orbitals from \[\pi \]-bond by overlapping with each other. One sp-orbital is \[\sigma \]-bonded to s-orbital of H-atom while the rest sp-orbital is \[\sigma \]-bonded to sp-orbital of other C-atom.
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