Chapter 8, Problem 14QP

Which of the following compounds are likely to occur as solid at room temperature?

$\begin{array}{l}\text{(a)}\text{BrCl}\\ \text{(b)}{\text{CaCO}}_{\text{3}}\\ \text{(c)}{\text{SO}}_{\text{2}}\\ \text{(d)}\text{CaO}\\ \text{(e)}\text{NO}\end{array}$