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Fertiliser Technology

Fertiliser Technology
Which of the following is not a measure component necessarily to be present in fertilisers?

Phosphorous
Potassium
Nitrogen
Sulphur

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Fertiliser Technology
Reaction of phosphate rock with 98% H₂SO₄ produces

None of these
Orthophosphoric acid
White phosphorous
Superphosphate

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Fertiliser Technology
__________ is required more for leafy crops.

Potassium
Phosphorous
Carbon
Nitrogen

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Fertiliser Technology
C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

20
6
13
2

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

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

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Fertiliser Technology
Electric process as compared to wet process (for the manufacture of phosphoric acid)

Produces a valuable by-product called gypsum
Can use only high grade phosphate rock
Is used less frequently
Is weak acid process

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