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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

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

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

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

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Fertiliser Technology
Promoter used in NH₃ synthesis catalyst is

SiO₃
K₂O
V₂O₅
U₂O₃

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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.

> 98
25-28
75-80
52-54

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Fertiliser Technology
Reaction of dilute sulphuric acid with phosphate rock produces

Triple superphosphate
Superphosphate
Gypsum
Phosphoric acid

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