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Fertiliser Technology

Fertiliser Technology
Maximum stability of white phosphorous is at

>600°C
Atmospheric pressure
Room temperature
Very high pressure

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Fertiliser Technology
Main component of bone ash is

Calcium phosphate
Calcium sulphate
Sodium phosphate
Calcium carbonate

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

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

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Fertiliser Technology
Reaction of orthophosphoric acid with phosphate rock produces

Metaphosphoric acid
Superphosphate
Triple superphosphate
Monoammonium phosphate

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Fertiliser Technology
Nitrogen content of a nitrogenous fertiliser is 35%. It could be

Calcium ammonium nitrate (CAN)
Ammonium nitrate
Ammonium sulphate
Urea

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Fertiliser Technology
Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

Its N₂ content is very low
It will evaporate on spraying
It is very costly
It is not available

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