Question
Which of the following species contains equal number of $$\sigma $$ and $$\pi $$ -bonds?
A.
$$HCO_3^ - $$
B.
$$Xe{O_4}$$
C.
$${\left( {CN} \right)_2}$$
D.
$$C{H_2}{\left( {CN} \right)_2}$$
Answer :
$$Xe{O_4}$$
Solution :
