(1) How many `sigma and pi` bonds are present in (i) `CH_(2) = CH - CN and (ii) CH_(2) = C CHCH_(3)`?

Explanation

(1)
(2) (i) `sigma_(C-H) = 3 , sigma_(C-C)=2,pi_(C=C)=1,sigma_(C-\N)=1,pi_(C=N)=2i.e., "total" sigma - bond = 6 and "total" pi - bond = 3`
(ii) `sigma_(C-H)=6,sigma_(C-C)=3,pi_(C=C)=2 i.e., "total" sigma - bond = 9 and "total" pi - bond = 2 `