Question

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

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

Answer 1

Answer: (B)

The carbide $\left(C_2^{2-}\right)$ ion has the following bonding pattern:
$:\bar{C}\equiv \bar{C}:$ one sigma and two pi bonds.