$\text{NH}_3(\text{aq})$ is introduced to separate samples of $\text{NaCl}(\text{aq})$, $\text{MgCl}_2(\text{aq})$, $\text{BaCl}_2(\text{aq})$ and $\text{SiCl}_4(\ell)$. In this experiment, only two of the samples give a white precipitate on addition of $\text{NH}_3(\text{aq})$. Which two samples are these?
- A$\text{MgCl}_2(\text{aq})$ and $\text{BaCl}_2(\text{aq})$
- B$\text{MgCl}_2(\text{aq})$ and $\text{SiCl}_4(\ell)$
- C$\text{NaCl}(\text{aq})$ and $\text{BaCl}_2(\text{aq})$
- D$\text{NaCl}(\text{aq})$ and $\text{SiCl}_4(\ell)$