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Fertiliser Technology

Fertiliser Technology
Triple superphosphate is chemically represented as

CaF₂.3Ca₃(PO₄)₂
3Ca₃(PO₄)₂
Ca(H₂PO₄)₂
Ca(PO₃)₂

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Fertiliser Technology
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.

High corrosion rate
All of these
Increased biuret formation
Increased cost of equipment

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

Superphosphate
Phosphorous
Phosphoric acid
Ammonium phosphate

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

Reduced iron oxide
Silica gel
Nickel
Vanadium pentoxide

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Fertiliser Technology
P₂O₅ percentage in the phosphoric acid produced by wet process is about

70
50
30
10

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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.

98
38
82
68

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