Which equation demonstrates hydrogen behaving as an oxidising agent?
- A$\mathrm{H_2 + 2K \rightarrow 2K^{+}H^{-}}$
- B$\mathrm{H_2 + I_2 \rightarrow 2HI}$
- C$\mathrm{H_2 + Cu_2S + ZnO \rightarrow 2Cu + ZnS + H_2O}$
- D$\mathrm{3H_2 + N_2 \rightarrow 2NH_3}$