Which of the following species contains equal number of σ- and π-bonds?

1 2015 AIPMT-I Chemical Bonding and Molecular StructureSigma and pi bonds Medium
Which of the following species contains equal number of $\sigma$- and $\pi$-bonds?
A $HCO_3^-$
B $XeO_4$
C $(CN)_2$
D $CH_2(CN)_2$

Detailed Solution


Each Xe=O bond has one $\sigma$ and one $\pi$ bond.
So $XeO_4$ has $4\sigma$ and $4\pi$ bonds — equal numbers.

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