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Fertiliser Technology

Fertiliser Technology
Maximum stability of white phosphorous is at

>600°C
Atmospheric pressure
Very high pressure
Room temperature

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Fertiliser Technology
Which of the following gasifiers can be attached to coal based fertiliser plants?

Gasifier working at 40 atm
Lurgi (high pressure) gasifier
Kopper-Totzek gasifier
Gasifier working at 20 atm

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Fertiliser Technology
Calcium ammonium nitrate (CAN) is

A mixed fertiliser
A straight fertiliser
Not a fertiliser ; it is an explosive
A complex fertiliser

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Fertiliser Technology
Action of phosphoric acid on rock phosphate produces

Triple superphosphate
Diammonium phosphate
Superphosphate
Nitrophosphate

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Fertiliser Technology
Chemical formula of biuret is

NH₄COONH₂
NH₂CONHCONH₂
NH₂.CO.NH₂
NH₃.COO.NH₃

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Fertiliser Technology
Low grade phosphate rock can be used in electrical furnace, because

Of the better CaO/SiO₂ balance for slag formation
It produces low cost product
CaO content is less
It is cheap

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