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Fertiliser Technology

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

Nickel
Alumina
Vanadium pentoxide
No

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Fertiliser Technology
Effectiveness of a fertiliser is independent of the

Type of crop
PH of soil
None of these
Nature of soil

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Fertiliser Technology
Raw materials for urea production are

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

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Fertiliser Technology
Chemical formula of metaphosphoric acid is

HPO₃
H₃PO₄
Same as that of pyrophosphoric acid
H₄P₂O₇

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Fertiliser Technology
Nitrogen content of urea is about __________ percent.

46
94
10
80

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Fertiliser Technology
Main constituent of phosphate rock is

Calcium fluoride
Flour apatite
Calcium phosphate
Ammonium phosphate

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