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Fertiliser Technology

Fertiliser Technology
Reaction of __________ acid with phosphate rock produces superphosphates.

Hydrochloric
Phosphoric
Nitric
Sulphuric

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Fertiliser Technology
Ammonium nitrate (a fertiliser) is coated with limestone powder to

Avoid the risk of explosion
Add extra nutrient as fertiliser
Cut down its production cost
Increase its nitrogen content

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Fertiliser Technology
A phosphatic fertiliser contains 16% P₂O₅. It could be

Superphosphate
None of these
Dicalcium phosphate
Triple superphosphate

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Fertiliser Technology
In calcium ammonium nitrate (CAN) fertil-ser

None of these
Nitrate nitrogen is slower acting
Nitrate nitrogen is quick acting
Ammoniacal nitrogen is quick acting

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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.

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

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Fertiliser Technology
Fertiliser plants get their N₂ requirements

By fractionation of liquified air
From producer gas
From coal gas (coke oven gas)
By dissociating oxides of nitrogen

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