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Fertiliser Technology

Fertiliser Technology
Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

Autocatalytic
Catalytic
Exothermic
Endothermic

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Fertiliser Technology
Heating a mixture of phosphate rock, coke and sand in an electric furnace produces

Superphosphate
Phosphoric acid
Phosphorous
Ammonium phosphate

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Fertiliser Technology
Nitrolime is

A mixture of ammonium nitrate and calcium nitrate
A mixture of nitric acid and lime
Calcium nitrate
Calcium ammonium nitrate

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Fertiliser Technology
Catalyst used in Haber's process for ammonia production is

Nickel
Vanadium pentoxide
Silica gel
Reduced iron oxide

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Fertiliser Technology
Lower temperature and large excess of ammonia in urea melt

Increases biuret formation
Does not effect biuret formation
Is undersirable
Decreases biuret formation

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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.

68
38
98
82

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