Which of the following reactions is a part of the large scale industrial preparation of nitric acid?
Cu(NO3)2 + 2NO2 + 2H2O $$\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $$ 4HNO3 + Cu
NaNO3 + H2SO4 $$\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $$ NaHSO4 + HNO3
4NH3 + 5O2 (from air) $$\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $$ 4NO + 6H2O
4HPO3 + 2N2O5 $$\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $$ 4HNO3 + P4O10
