J can be $\text{MgCl}_2$ or $\text{AlCl}_3$. K can be $\text{SiO}_2$ or $\text{SiCl}_4$. $\text{J}(aq) \xrightarrow[]{\text{add drops of aqueous sodium hydroxide}}$ white precipitate $\xrightarrow[]{\text{add an excess of aqueous sodium hydroxide}}$ precipitate dissolves $\text{K} \xrightarrow[]{\text{add water}}$ misty white fumes and a white precipitate in a solution with $\text{pH} < 7$ Which row is the correct one?
- Aidentity of J: $\text{AlCl}_3$; identity of K: $\text{SiCl}_4$
- Bidentity of J: $\text{AlCl}_3$; identity of K: $\text{SiO}_2$
- Cidentity of J: $\text{MgCl}_2$; identity of K: $\text{SiCl}_4$
- Didentity of J: $\text{MgCl}_2$; identity of K: $\text{SiO}_2$