A pair of students, $P$ and $Q$, had to sketch bar charts to show how the sizes of certain properties of the halogens and their compounds vary. Their sketches are given. The bar charts indicate only the pattern of change, not the real numerical values. Student $P$: solubility of $\text{AgX}(s)$ in $\text{NH}_3(aq)$. Student $Q$: $\Delta H^\circ$ for $\text{H}_2(g) + X_2(g) \rightarrow 2\text{HX}(g)$. Which of the students have produced bar charts that display the trends correctly?
- Aboth P and Q
- BP only
- CQ only
- Dneither P nor Q