Question

Which of the following species contains equal number of $\sigma$ and $\pi$-bonds?

• A. $HC{O}_3^{-}$
• B. $Xe{O}_4$
• C. $(CN{)}_2$
• D. $C{H}_2(CN{)}_2$

Answer 1

Answer: (B)

$Xe{O}_4$ contain equal number of $\sigma$ and $\pi$-bonds. Number of $\sigma$ and $\pi$-bonds present in species are as follows:

Structure		$\sigma$ and $\pi$-bonds
a		$\sigma$ - bond-4 $\pi$ - bond-1
b		$\sigma -$ bond-4 $\pi$ - bond-4
c		$\sigma -$ bond-3 $\pi$ - bond-4
d		$\sigma$ - bond- 6 $\pi$ - bond-4