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Fertiliser Technology

Fertiliser Technology
Sodium tri poly phosphate (STPP) is chemically represented as

Na₃P4O₆
Na₅P3O₁₀
Na₂PO₄
Na₄P3O₈

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Fertiliser Technology
Which of the following is a natural inorganic fertiliser?

Gobar mannure
None of these
Oilcake
Chile salt petre

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Fertiliser Technology
During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH₃ to NO is about __________ percent.

98
38
82
68

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Fertiliser Technology
Temperature and pressure in urea autoclave is

400°C and 550 atm
120°C and 300 atm
200°C and 10 atm
190°C and 200 atm

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Fertiliser Technology
HPO₃ is the chemical formula of __________ phosphoric acid.

Meta
None of these
Ortho
Pyro

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Fertiliser Technology
Potassic fertilisers do not promote the development of

Stems & leaves during early stage of plant growth
Fibrous materials of plants
Starches of potatoes & grains
Sugar of fruits & vegetables

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