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.
`C_(6) H_(12)`: It has 1 D.U., so it can be an alkene or cvclohexane.
`(CH_(2) = CH - CH_(2) - CH_(2) - CH_(2) - CH_(3))`

III. `H-underset(H)underset(|)overset(Cl)overset(|)(C )-Cl` (`4 sigma`-bonds)
`CH_(2) = C = CH_(2)` (`6 sigma`-bonds, `2 pi-` bonds)
V. `H_(3)C-underset(O^(ɵ))underset(|)overset(o+)(N)=O` (`6 sigma`-bonds, `1 pi`-bond)
VI. `H-overset(O)overset(||)(C )-NH-CH_(3)` (`8 sigma`-bonds, `1 pi`-bond)