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Which of the following reactions is a part of the large scale industrial preparation of nitric acid?
Detailed Solution
On a large scale nitric acid is prepared by Ostwald's process: (i) $4NH_3+5O_2\xrightarrow[500\ K,\ 9\ bar]{Pt/Rh\ gauze}4NO+6H_2O$; (ii) $2NO+O_2\rightarrow2NO_2$; (iii) $3NO_2+H_2O\rightarrow2HNO_3+NO$.