JEE Main Chemistry question

How many - and -bonds are there in the molecule of tetracyanoethylene, ?

(A)Nine - and nine Correct
(B)Five - and nine
(C)Nine - and seven
(D)Five - and eight

Answer: (A)

Solution

The central C=C double bond contributes 1 sigma and 1 pi bond. Each of the 4 central-to-cyano carbon-carbon single bonds contributes 1 sigma bond each (4 sigma total). Each of the 4 $C ≡

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Question ID VK-133532