Individual $1.0\,$g portions of $\text{Na}_2\text{O}$, $\text{MgO}$, $\text{Al}_2\text{O}_3$, $\text{SiO}_2$, $\text{NaCl}$, $\text{MgCl}_2$, $\text{Al}_2\text{Cl}_6$ and $\text{SiCl}_4$ are each placed in separate beakers containing water and then stirred. The number of beakers that contain a white solid is $Q$. Next, an excess of $\text{NaOH(aq)}$ is added to every beaker and the mixture is stirred. The number of beakers that now contain a white solid is $R$. Which row is the correct one?
- A$Q = 3,\ R = 2$
- B$Q = 3,\ R = 3$
- C$Q = 4,\ R = 3$
- D$Q = 4,\ R = 4$