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Fertiliser Technology

Fertiliser Technology
Triple superphosphate is chemically represented as

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

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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
__________ is the most suitable fertiliser for paddy.

Potassium nitrate
Urea
Superphosphate
Ammonium sulphate

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Fertiliser Technology
A fertiliser contains 82% N₂. It could be

Ammonium nitrate
None of these
Liquid NH₃
Urea

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Fertiliser Technology
Which is the best fertiliser for paddy?

Superphosphate
Nitro-phosphate
Ammonium sulphate
Potassium nitrate

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Fertiliser Technology
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

Sulphuric
Hydrochloric
Neither A nor B
Either A or B

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