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Fertiliser Technology

Fertiliser Technology
Reaction of dilute sulphuric acid with phosphate rock produces

Triple superphosphate
Superphosphate
Phosphoric acid
Gypsum

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Fertiliser Technology
Low grade phosphate rock can be used in electrical furnace, because

It is cheap
CaO content is less
It produces low cost product
Of the better CaO/SiO₂ balance for slag formation

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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

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

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

Exothermic
Irreversible
Endothermic
None of these

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Fertiliser Technology
Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

Complex
Highly explosive
Mixed
Highly hygroscopic

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Fertiliser Technology
P₂O₅ content in superphosphate is about __________ percent.

15-20
65-70
30-35
85-90

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