Chapter 9.5, Problem 1CP

Which of the following molecules contain one or more pi bonds? (Select all that apply.)

$\begin{array}{l}\text{a)}\hfill \\ {\text{N}}_{\text{2}}\hfill \\ \text{b)}\hfill \\ \text{Cl,}\hfill \\ \text{c)}\hfill \\ {\text{CO}}_{\text{2}}\hfill \\ \text{d)}\hfill \\ {\text{CH}}_{\text{3}}\text{OH}\hfill \\ \text{e)}\hfill \\ {\text{CCl}}_{\text{4}}\hfill \end{array}$