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Fertiliser Technology

Fertiliser Technology
Chemical formula of metaphosphoric acid is

H₃PO₄
H₄P₂O₇
HPO₃
Same as that of pyrophosphoric acid

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Fertiliser Technology
Raw materials for nitric acid manufacture are

Anhydrous ammonia and air
Hydrogen peroxide, air and water
Wet ammonia, air and water
Anhydrous ammonia, air and water

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Fertiliser Technology
NPK fertiliser is a __________ fertiliser.

Phosphatic
Complex
Mixed
Nitrogenous

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

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

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Fertiliser Technology
NPK means a __________ fertiliser.

Mixed
Potassic
Solid
Liquid

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Fertiliser Technology
Reaction of orthophosphoric acid with phosphate rock produces

Superphosphate
Metaphosphoric acid
Triple superphosphate
Monoammonium phosphate

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