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Fertiliser Technology

Fertiliser Technology
Heating a mixture of phosphate rock, coke and sand in an electric furnace produces

Ammonium phosphate
Phosphorous
Superphosphate
Phosphoric acid

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Fertiliser Technology
Maximum nitrogen percentage is in

Liquid ammonia
Calcium ammonium nitrate
Ammonium sulphate
Urea

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Fertiliser Technology
In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.

Udhe
Kellog
Claude
Fauser-Monte Catini

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

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

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Fertiliser Technology
In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

Metaphosphoric acid
CaSO₄ .½H₂O and CaSO₄ crystals
Pyrophosphoric acid
All of these

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Fertiliser Technology
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

Carbonate
Silicate
Bicarbonate
Phosphate

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