Which of the following reactions is a part of the large-scale industrial preparation of nitric acid?
- A$NaNO_3 + H_2SO_4 \xrightarrow{500 \ K, 9 \ bar} NaHSO_4 + HNO_3$
- B$4NH_3(g) + 5O_2(g) \xrightarrow[Pt/Rh \ \text{catalyst}]{500 \ K, 9 \ bar} 4NO(g) + 6H_2O(g)$
- C$4HPO_3 + 2N_2O_5 \xrightarrow{500 \ K, 9 \ bar} 4HNO_3 + P_4O_{10}$
- D$Cu(NO_3)_2 + 2NO_2 + 2H_2O \xrightarrow{500 \ K, 9 \ bar} 4HNO_3 + Cu$
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