CSEC Chemistry · May/June 2017 · Paper 1 · Question Q56

Which of the following reactions is LEAST likely to occur?

1. (A)\text{Mg}(\text{s}) + \text{Zn(NO}_3)_2(\text{aq}) \rightarrow \text{Mg(NO}_3)_2(\text{aq}) + \text{Zn}(\text{s})
2. (B)\text{Cu}(\text{s}) + 2\text{AgNO}_3(\text{aq}) \rightarrow \text{Cu(NO}_3)_2(\text{aq}) + 2\text{Ag}(\text{s})
3. (C)\text{Fe}(\text{s}) + \text{Cu(NO}_3)_2(\text{aq}) \rightarrow \text{Fe(NO}_3)_2(\text{aq}) + \text{Cu}(\text{s})
4. (D)\text{Pb}(\text{s}) + \text{Fe(NO}_3)_2(\text{aq}) \rightarrow \text{Pb(NO}_3)_2(\text{aq}) + \text{Fe}(\text{s})