question_answer

    How many o and n bonds are there in the molecule of tetracyanoethene? \[{{(NC)}_{2}}C=C{{(CN)}_{2}}\]

A)  \[9\sigma ,7\pi \]                           

B)  \[5\sigma ,9\pi \]

C)  \[5\sigma ,8\pi \]                           

D)  \[9\sigma ,9\pi \]

Correct Answer: D

Solution :

                  Hence,\[9\sigma \]and\[9\pi \]bonds are present in tetracyanoethene.