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ICSE Class 10 Chemistry Question 3 of 63

Study of Compounds — Nitric Acid — Question 7

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Question 7

Convert ammonia to nitric acid by Ostwald's process giving all conditions.

Answer

Step I : 4NH3+5O2→700−800°CPt4NO+6H2O+21.5K cals4\text{NH}_3 + 5\text{O}_2 \xrightarrow[700-800 \degree\text{C}]{\text{Pt}} \text{4NO} + \text{6H}_\text{2}\text{O} + 21.5 \text{K cals}

Step II : 2NO+O2→50°C2NO22\text{NO} + \text{O}_2 \xrightarrow{50 \degree\text{C}} \text{2NO}_\text{2}

Step III : 4NO2+2H2O+O2⟶4HNO34\text{NO}_\text{2} + 2\text{H}_\text{2}\text{O} + \text{O}_2 \longrightarrow 4\text{HNO}_3