The diagram below shows an unfinished energy profile diagram for a reaction. Which reactions could this diagram be describing? 1 $\text{CaCO}_3(s) \rightarrow \text{CaO}(s) + \text{CO}_2(g)$ 2 $\text{H}_2(g) \rightarrow 2\text{H}(g)$ 3 $\text{Cl}^-(aq) \rightarrow \text{Cl}(g) + aq$
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct