Solid J contains cations together with chloride ions. When dissolved in water, the solution of J is colourless. Two different samples of this solution are then tested. In the first sample, adding aqueous sodium hydroxide gives a white precipitate. In the second sample, adding aqueous ammonia gives a white precipitate. Which statement about J is correct?
- AThe cation in J must be $\text{Al}^{3+}$.
- BThe cation in J must be $\text{Fe}^{2+}$.
- CWhen dilute nitric acid and then aqueous barium nitrate are added to an aqueous solution of J, a white precipitate is formed.
- DWhen dilute nitric acid and then aqueous silver nitrate are added to an aqueous solution of J, a white precipitate is formed.