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FERTILISER TECHNOLOGY

Fertiliser Technology
In ammonia synthesis (N₂ + 3H₂ = 2NH₃), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at

Very high temperature
Low pressure
High pressure
Atmospheric pressure; as the pressure has no effect on conversion

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Fertiliser Technology
Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?

Cryogenic removal of H₂ from coke oven gas
Steam reforming of naphtha
Electrolysis of water
Natural gas cracking

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Fertiliser Technology
Promoter used in NH₃ synthesis catalyst is

V₂O₅
SiO₃
U₂O₃
K₂O

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Fertiliser Technology
Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.

75-80
52-54
> 98
25-28

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Fertiliser Technology
Reaction of dilute sulphuric acid with phosphate rock produces

Gypsum
Superphosphate
Phosphoric acid
Triple superphosphate

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