The table shows the concentrations and pH values for the aqueous solutions of two compounds, X and Y. Either compound may be an acid or a base. For X: concentration $2\,\text{mol dm}^{-3}$, pH $6$. For Y: concentration $2\,\text{mol dm}^{-3}$, pH $9$. Student P concluded that X is a strong acid. Student Q concluded that the extent of dissociation is lower in X(aq) than in Y(aq). Which of the students are correct?
- Aboth P and Q
- Bneither P nor Q
- CP only
- DQ only