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Fertiliser Technology

Fertiliser Technology
Catalytic ammonia synthesis reaction as in Haber's process is

Endothermic
None of these
Irreversible
Exothermic

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Fertiliser Technology
Nitric acid is produced on commercial scale in a fertiliser plant by

Passing air through high voltage electric arc
CaNO₃ + H₂SO₄ reaction
None of these
Oxidation of ammonia

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Fertiliser Technology
Reaction of orthophosphoric acid with soda ash produces

Nitrophosphate
Tributyl phosphate
Sodium tripolyphosphate (STPP)
Tricresyl phosphate

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Fertiliser Technology
Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

Cryogenic separation of hydrogen from coke oven gas
Electrolysis of water
Steam reforming of naphtha and cracking of natural gas
All of these

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Fertiliser Technology
Heating of orthophosphoric acid to 250°C produces

No change in it
Metaphosphoric acid
None of these
Pyrophosphoric acid

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Fertiliser Technology
In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process

Requires lower capital investment in the plant
Produces lower purity acid
Is very costly
Uses lower grade phosphate rock

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