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Fertiliser Technology

Fertiliser Technology
Phosphatic fertiliser is graded based on its __________ content.

H₃PO₄
PCl5
P₂O₃
P₂O₅

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Fertiliser Technology
Commercial fertilisers are available mostly in the form of

Lumps
Grannules
Flakes
Powder

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

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

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Fertiliser Technology
Temperature and pressure in urea autoclave is

400°C and 550 atm
120°C and 300 atm
200°C and 10 atm
190°C and 200 atm

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Fertiliser Technology
Nitric acid is produced on commercial scale in a fertiliser plant by

Passing air through high voltage electric arc
Oxidation of ammonia
CaNO₃ + H₂SO₄ reaction
None of these

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

Nickel
Vanadium pentoxide
Reduced iron oxide
Silica gel

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