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Fertiliser Technology

Fertiliser Technology
Triple superphosphate is chemically represented as

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

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Fertiliser Technology
With increases in pressure, the conversion of ammonium carbamate into urea

Can either increase or decrease depends on biuret content
Remains unaltered
Decreases
Increases

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Fertiliser Technology
Maximum stability of white phosphorous is at

Atmospheric pressure
Room temperature
Very high pressure
>600°C

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Fertiliser Technology
Ammonia synthesis gas is produced from natural gas by

Hydrogenation
Steam reforming
Partial oxidation
Thermal cracking

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Fertiliser Technology
During conversion of ammonium carbamate into urea, presence of large excess of water

Increases the yield of urea
Does not affect the yield of urea
Adversely affects the yield of urea
Reduces the evaporator load by diluting the urea solution

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Fertiliser Technology
Effectiveness of a fertiliser is independent of the

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

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