Question

The number of types of bonds between two carbon atoms in calcium carbide is:

• A. One sigma and one pi
• B. Two sigma and one pi
• C. Two sigma and two pi
• D. One sigma and two pi

Answer 1

The correct option is D One sigma and two pi

In calcium carbide, the structure of carbide ion $\left(C_2^{2-}\right)$ is ${}^{\ominus }C\equiv C^{\ominus }$. So, there are one $\sigma$ bond and two $\pi$ bonds.