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Fertiliser Technology

Fertiliser Technology
Ammonia synthesis gas is produced from fuel oil by

Steam reforming
Hydrocracking
Partial oxidation
Hydrogenation

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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
CaH₄(PO₄)₂ is the chemical formula of

Triple superphosphate
Meta phosphoric acid
Superphosphate
Calcium phosphate

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Fertiliser Technology
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?

Naphtha
Water
Coal/coke oven gas
Tar

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Fertiliser Technology
Chemical formula of metaphosphoric acid is

H₃PO₄
HPO₃
Same as that of pyrophosphoric acid
H₄P₂O₇

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Fertiliser Technology
In an ammonia plant, the purge off is essential to

Maintain inert gas concentration within a limit
Remove uncondensed ammonia vapour
Remove excess poisonous gases
Maintain H₂ : N₂ ratio at 3 :1

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