question_answer

The number of\[\sigma \]and\[\pi \]bonds in tetrocyano ethylene, are respectively

A)  8, 9                                       

B)  9, 1

C)   5, 1                                      

D)  9, 9

Correct Answer: D

Solution :

                 The structure of tetracyanoethylene is [\[\because \]double bond\[=1\sigma +1\pi \]bonds, triple bond\[=1\sigma +2\pi \]bonds] Hence, number of a and Ti-bonds = 9 and 9.