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Fertiliser Technology

Fertiliser Technology
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

Carbonate
Silicate
Phosphate
Bicarbonate

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Fertiliser Technology
Urea is represented as

NH.CO₂.NH
NH₃.CO₂.NH₃
NH₃CO.CH₃
NH₂.CO.NH₂

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Fertiliser Technology
Electric furnace method for production of phosphorous uses phosphate rock

And phosphoric acid
And coke
And sulphuric acid
Silica and coke

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Fertiliser Technology
Biuret formation in urea is kept at minimum (< 1 %), because it is

Explosive in nature
Helpful in decomposition of urea
Corrosive in nature
Toxic and harmful to some crops

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Fertiliser Technology
Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?

Phosphatic fertiliser
Potassic fertiliser
None of these
Nitrogeneous fertiliser

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Fertiliser Technology
Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

Reversible
Exothermic
Endothermic
Catalytic

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