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Fertiliser Technology

Fertiliser Technology
Chemical formula of biuret is

NH₄COONH₂
NH₂CONHCONH₂
NH₂.CO.NH₂
NH₃.COO.NH₃

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

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

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Fertiliser Technology
Phosphoric acid is produced in wet process from phosphate rock and

Concentrated H₂SO₄
Concentrated HCl
Dilute H₂SO₄
Concentrated NHO₃

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Fertiliser Technology
Electric process as compared to wet process (for the manufacture of phosphoric acid)

Is weak acid process
Can use only high grade phosphate rock
Is used less frequently
Produces a valuable by-product called gypsum

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Fertiliser Technology
Red phosphorous is changed into white phosphorous by

None of these
Vaporisation followed by condensation
Melting under pressure
Heating in presence of light

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Fertiliser Technology
5-10-5 fertilisers mean that they contain

Only 5 to 10% active fertiliser constituents
5 to 10% filler & carrier of soil conditioners
5, 10, 5% respectively of N₂, P₂O₅ and K₂O
None of these

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