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Fertiliser Technology

Fertiliser Technology
Heating of orthophosphoric acid to 250°C produces

None of these
Pyrophosphoric acid
Metaphosphoric acid
No change in it

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Fertiliser Technology
Reaction of anhydrous liquid ammonia with orthophosphoric acid produces

Triple superphosphate
Ammonium phosphate
Superphosphate
None of these

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Fertiliser Technology
__________ is the undesirable by-product produced in the manufacture of urea.

Carbon dioxide
Biuret
Ammonium carbonate
Ammonium carbamate

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Fertiliser Technology
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in

Substantially wet non-flowing and sticky product
Non-spherical prills
Low bulk density product
Biuret formation

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Fertiliser Technology
Raw materials for urea production are

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

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Fertiliser Technology
A potassic fertiliser contains 50% K₂O. It could be

A mixture of NaCl+ KCl
None of these
Potassium sulphate
Potassium chloride

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