A) two sigma, two pi
B) two sigma, one pi
C) one sigma, two pi
D) one sigma, one pi
Correct Answer: C
Solution :
\[Ca{{C}_{2}}\] (Calcium carbide) is ionic. \[Ca{{C}_{2}}\xrightarrow{{}}C{{a}^{2+}}+C_{2}^{2-}\] \[^{-}C\equiv {{C}^{-}}\] \[C_{2}^{2-}\]has one\[\sigma \]and two\[\pi \]bonds.
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