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Fertiliser Technology

Fertiliser Technology
Main constituent of phosphate rock is

Ammonium phosphate
Flour apatite
Calcium phosphate
Calcium fluoride

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Fertiliser Technology
Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant?

Urea
CAN
Superphosphate
Ammonium sulphate

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Fertiliser Technology
Reaction of orthophosphoric acid with soda ash produces

Tricresyl phosphate
Nitrophosphate
Tributyl phosphate
Sodium tripolyphosphate (STPP)

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Fertiliser Technology
Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

Increasing the temperature
Decreasing the temperature
None of these
Decreasing the pressure

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Fertiliser Technology
Base suspension fertiliser essentially contains

43% N₂ and 13% P₂O₅
43% N₂ and 13% K₂O
43% K₂O and 43% P₂O₅
13% N₂ and 43% P₂O₅

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Fertiliser Technology
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

Improving the strength & heat resistance
All of these
Increasing the effectiveness
Stabilisation

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