Chapter 11, Problem 15E

Write Lewis structures for the following molecules, and then label each $\sigma$ and $\pi$ bond. (a) HCN;(b) ${\text{C}}_{\text{2}}{\text{N}}_{\text{2}}$ ;(c) ${\text{CH}}_{\text{2}}{\text{CHCHCCl}}_{\text{2}}$ ; (d) HONO.