Question

The number and type of bonds between two carbon atoms in $Ca{C}_2$ are:

• A. one sigma $\left(\sigma \right)$ and one pi $\left(\pi \right)$-bond
• B. one sigma $\left(\sigma \right)$ and two pi $\left(\pi \right)$-bonds
• C. one sigma $\left(\sigma \right)$ and one and a half pi $\left(\pi \right)$-bonds
• D. one sigma $\left(\sigma \right)$-bond

Answer 1

Answer: (B)

one sigma $\left(\sigma \right)$ and two pi $\left(\pi \right)$-bonds

The number and type of bonds between two carbon atoms in $Ca{C}_2$ are one sigma $\left(\sigma \right)$ and two pi $\left(\pi \right)$-bonds and ionic bonds between $C{a}^{+2}$ ion and carbide ion. $C_2^{2-}$ has ${[C\equiv C]}^{2-}$structure.