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Fertiliser Technology

Fertiliser Technology
__________ catalyst is used in the production of urea from CO₂ and NH₃.

Nickel
Vanadium pentoxide
No
Alumina

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Fertiliser Technology
Temperature and pressure in urea autoclave is

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

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Fertiliser Technology
Yield of elemental phosphorous from rock phosphate is about __________ percent.

15-25
60-65
1-2
40-45

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Fertiliser Technology
Which nutrient in fertiliser makes the plant stems stronger and increases branching?

Phosphorous
Calcium
Potassium
Nitrogen

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Fertiliser Technology
Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

Presence of a reducing atmosphere
Absence of air
Presence of an oxidising atmosphere
Presence of an inert atmosphere

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Fertiliser Technology
Rock phosphate used for the production of phosphatic fertiliser is mined at

Bailladella (M.P.)
Amjhor (Jharkhand)
Kiriburu (Bihar)
Talchar (Orissa)

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