Fertiliser Technology
During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH₃ to NO is about __________ percent.

38
68
82
98

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Fertiliser Technology
Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?

High pressure, low reactants concentration, high temperature
High pressure, high reactants concentration, low temperature
Low pressure, high reactants concentration, low temperature
High pressure, low reactants concentration, low temperature

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Fertiliser Technology
Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of

High cost of the high pressure vessel used for the reactor
Comparatively higher pressure drop
Higher pumping cost
Chances of entrainment and disturbance of catalyst bed

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