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Fertiliser Technology

Fertiliser Technology
Commercial fertilisers are available mostly in the form of

Powder
Lumps
Flakes
Grannules

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Fertiliser Technology
Raw materials for urea production are

CO₂, H₂ and N₂
HNO₃ and CaCO₃
CO₂ and N₂
NH₃ and CO

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Fertiliser Technology
CaH₄(PO₄)₂ is the chemical formula of

Triple superphosphate
Meta phosphoric acid
Superphosphate
Calcium phosphate

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Fertiliser Technology
In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

All of these
Pyrophosphoric acid
CaSO₄ .½H₂O and CaSO₄ crystals
Metaphosphoric acid

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Fertiliser Technology
Main constituent of phosphate rock is

Flour apatite
Calcium fluoride
Calcium phosphate
Ammonium phosphate

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Fertiliser Technology
Ammonium nitrate (a fertiliser) is coated with limestone powder to

Avoid the risk of explosion
Increase its nitrogen content
Add extra nutrient as fertiliser
Cut down its production cost

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