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Fertiliser Technology

Fertiliser Technology
Heating of orthophosphoric acid to about 900°C, produces

Pyrophosphoric acid
No change in it
Metaphosphoric acid
None of these

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Fertiliser Technology
P₂O₅ content in triple superphosphate is about __________ percent.

85-90
15-20
70-75
42-50

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Fertiliser Technology
__________ is not a fertiliser.

Calcium ammonium nitrate
Ferrous sulphate
Ammonium sulphate
Liquid ammonia

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Fertiliser Technology
Triple superphosphate is chemically represented as

CaF₂.3Ca₃(PO₄)₂
Ca(H₂PO₄)₂
3Ca₃(PO₄)₂
Ca(PO₃)₂

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Fertiliser Technology
Triple superphosphate is made by reacting phosphate rock with __________ acid.

Phosphoric
Hydrochloric
Sulphuric
Nitric

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Fertiliser Technology
An increase in the NH₃/CO₂ ratio in urea manufacture results in

Decreased specific volume of molten mass
Decreased degree of conversion of NH₃ to urea
Decreased yield of urea
Increased degree of conversion of CO₂ to urea

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