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Fertiliser Technology

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

And sulphuric acid
And coke
Silica and coke
And phosphoric acid

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Fertiliser Technology
Gas based fertiliser plants use

Coal gas as heating medium
Natural gas as a source of hydrogen
Coal gas as a source of hydrogen
Natural gas as heating medium

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Fertiliser Technology
P₂O₅ content in superphosphate is about __________ percent.

85-90
65-70
15-20
30-35

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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.

38
98
68
82

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

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

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Fertiliser Technology
Which of the following does not come under the category of 'micro-nutrient' for plant growth?

Chlorine
Carbon
Iron
Boron

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