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Fertiliser Technology

Fertiliser Technology
Yield of elemental phosphorous from rock phosphate is about __________ percent.

40-45
1-2
15-25
60-65

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Fertiliser Technology
Catalyst used in ammonia synthesis uses __________ as a promoter.

K₂O
Al2O₃
Pt
Ni

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Fertiliser Technology
A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

Sand & coke
And coke
And sand
Salt & coke

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Fertiliser Technology
Raw materials for urea production are

CO₂ and N₂
NH₃ and CO
HNO₃ and CaCO₃
CO₂, H₂ and N₂

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Fertiliser Technology
Color of nitric acid is light yellow due to the presence of

N₂H₅
NO₂
NO
NH₃

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Fertiliser Technology
Both white phosphorous as well as red phosphorous

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

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