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Fertiliser Technology

Fertiliser Technology
Temperature and pressure in urea autoclave is

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

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Fertiliser Technology
H₄P₂O₇ is the chemical formula of __________ phosphoric acid.

Ortho
Meta
Pyro
None of these

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Fertiliser Technology
Iron is not used alone as a catalyst in ammonia synthesis, because

None of these
It decomposes ammonia
Its activity declines rapidly, if heated to above 520°C
It gets oxidised above 500°C

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Fertiliser Technology
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

Phosphoric acid
Phosphorous
Triple superphosphate
Superphosphate

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

Triple superphosphate
Dicalcium phosphate
Superphosphate
None of these

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Fertiliser Technology
__________ is not a fertiliser.

Liquid ammonia
Calcium ammonium nitrate
Ammonium sulphate
Ferrous sulphate

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