Three reaction equations are given below. 1. $\text{Pb(NO}_3)_2\text{(aq)} + 2\text{KI(aq)} \rightarrow \text{PbI}_2\text{(s)} + 2\text{KNO}_3\text{(aq)}$ 2. $2\text{AgNO}_3\text{(aq)} + \text{CuI}_2\text{(aq)} \rightarrow \text{Cu(NO}_3)_2\text{(aq)} + 2\text{AgI(s)}$ 3. $\text{CuO(s)} + \text{H}_2\text{SO}_4\text{(aq)} \rightarrow \text{CuSO}_4\text{(aq)} + \text{H}_2\text{O(l)}$ Which of these reactions can be used to prepare a salt by precipitation?
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3