Question: The number and type of bonds in $\mathrm{C}_{2}^{2-}$ ion in $\mathrm{CaC}_{2}$ are:
Two $\sigma$ bonds and one $\pi$ - bond
Two $\sigma$ bonds and two $\pi$ - bonds
One $\sigma$ bond and two $\pi$ - bonds
One $\sigma$ bond and one $\pi$ - bond
Correct Option: , 3
Solution:
