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Fertiliser Technology

Fertiliser Technology
Chemical formula of biuret is

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

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Fertiliser Technology
Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

Is toxic and highly corrosive
Vaporises at normal temperature
Has a pungent smell
Is in short supply

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Fertiliser Technology
Both white phosphorous as well as red phosphorous

Are soluble in CS₂
Burns when heated in air
All of these
Reacts with hot caustic soda solution to give phosphine

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Fertiliser Technology
Hydrogen content of coke oven gas is __________ percent.

22
4
58
84

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Fertiliser Technology
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

1000-1200
250-400
50-80
800-900

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Fertiliser Technology
Potassic fertiliser is graded based on its __________ content.

K₂O
K₂SO₄
KCl
KNO₃

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