How many sigma and pi bonds are presents in each of the following molecules?
(a) `CH_(3) - CH= CH_(2)` (b) `CH_(3) - C = C-CH_(3)` (c ) `HC -= "CCH" = CHCH_(3)`

Explanation

(a) `sigma_(C-C) : 2, sigma_(C-H): 6, pi=1`
(b) `sigma_(C-C) : 3, sigma_(C-H): 6, pi=2`
(c ) `sigma_(C-C) : 4, sigma_(C-H): 6, pi=3`