Large-scale manufacture of nitric acid by Ostwalds process utilizes the reaction
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a
2NaNO3+H2SO4→Na2SO4+2HNO3
b
4NH3+5O2→4NO+6H2O
c
NO2+NO3−+H2O→2HNO3
d
2NO+O2+H2O→HNO3+HNO2
answer is B.
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Detailed Solution
The restricted oxidation of NH3 can be done with air, when the mixture is passed over heated platinum gauze at 700oC to 800oC.4NH3+5O2→4NO+6H2O2NO+O2→2NO23NO2+H2O→2HNO3+NOThis is the Ostwald's process used for manufacture of HNO3