The diagram illustrates an experiment. A small amount of aqueous P is added onto solid Q and the tap on the funnel is closed. Which pairs of substances make the syringe fill with gas?
- A$\text{HNO}_3$ and Mg; HCl and Cu; $\text{H}_2\text{SO}_4$ and $\text{Na}_2\text{CO}_3$
- B$\text{HNO}_3$ and Mg; HCl and Cu; $\text{H}_2\text{SO}_4$ and $\text{Na}_2\text{CO}_3$ (no reaction in last)
- C$\text{HNO}_3$ and Mg; HCl and Cu (no reaction); $\text{H}_2\text{SO}_4$ and $\text{Na}_2\text{CO}_3$
- D$\text{HNO}_3$ and Mg (no reaction); HCl and Cu; $\text{H}_2\text{SO}_4$ and $\text{Na}_2\text{CO}_3$