Dilute sulfuric acid is added to two different aqueous solutions, X and Y. The results are as follows. solution X: white precipitate solution Y: bubbles of a colourless gas Which row indicates the ions present in the solutions?
- Asolution X: $\text{Ba}^{2+}$ ; solution Y: $\text{CO}_3^{2-}$
- Bsolution X: $\text{Ca}^{2+}$ ; solution Y: $\text{Cl}^-$
- Csolution X: $\text{Cu}^{2+}$ ; solution Y: $\text{CO}_3^{2-}$
- Dsolution X: $\text{Fe}^{2+}$ ; solution Y: $\text{NO}_3^-$