1.

Which of the following species contains equal number of sigam and pi -bonds ?

Answer»

`(CN)_(2)`
`CH_(2) (CN)_(2)`
`HCO_(3)^(-)`
`XeO_(4)`

SOLUTION :`(CN)_(2) : N-=C - C-=N (3sigma + 4PI)`
`CN_(2) (CN)_(2) : N-=C - underset(H)underset(|)overset(H)overset(|)C-C-=N (6sigma + 4pi)`


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