Indicate the number of `sigma`-and `pi`-bonds in the following molecules:
(i) `CH_(3)-C-=C-H` (ii) `CH_(3)-CH=CH_(2)`
(iii) `H_(2)C=C=CH_(2)` (iv) `CH_(3)-CH_(2)-CH_(3)`
(v) `H_(2)C=C-CH-CH_(3)` (vi) `HC=C-CH=CHCH_(3)`
(vii) `H_(2)C =CH-C-=N` (viii) `CH_(3)OH`
(ix) `CH_(3)-C-=N` (x) `CH_(3)NO_(2)`
(xi) `CH_(2)CI_(2)` (xii) `C_(6)H_(12)` (Hexene)

Answer

(i) `sigma`-bonds `=6, pi`-bonds = 2
(ii) `sigma`-bonds `= 8,pi` bond=1
(iii) `sigma-`bonds `= 6,pi`-bonds = 2
(iv) `sigma`-bonds = 10
(v) `sigma`-bonds `=9,pi`-bonds = 2
(vi) `sigma-`bonds `10,pi`-bonds = 3
(vii) `sigma`-bonds `= 6,pi`-bonds = 3
(viii) `sigma`-bonds `=5,pi`-bonds = Nil
(ix) `sigma`-bons `= 5,pi`-bonds = 2
(x) `sigma`-bonds `= 6,pi`-bond = 1
(xi) `sigma`-bonds = 4
(xii) `sigma`-bons `=17,pi`-bons = 1