Indicate the `sigma` and `pi` bonds in the following molecules :
`C_(6)H_(6), C_(6)H_(12), CH_(2)C_(l2), CH_(2)=C=CH_(2), CH_(3)NO_(2), HCONHCH_(3)`

Explanation

(i) 12 sigma and 3 pi

(ii) 18 Sigma or 17 sigma and 1 pie

(iii)
(iv)
(v) 5 sigmal 1 pi and 1 dative bond

8 sigma, 1 pi 1 sigma from structure
`{:(" O H H"),(" "sigma"||"pi " "|sigma " "|sigma),(H underset(sigma)overset(sigma)-C underset(sigma)-N underset(sigma)-C underset(sigma)-H),(" "|sigma),(" "H):}`