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Fertiliser Technology

Fertiliser Technology
Catalyst used in the oxidation of ammonia is

Platinum-molybdenum
Platinum-rhodium
Platinum-beryllium
Cobalt-molybdenum

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Fertiliser Technology
Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

Increasing the temperature
Decreasing the pressure
None of these
Decreasing the temperature

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Fertiliser Technology
Reaction of calcium fluorapatite with sulphuric acid produces

Simple superphosphate
Ortho-phosphoric acid
Red phosphorous
Triple superphosphate

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

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Fertiliser Technology
H₄P₂O₇ is the chemical formula of __________ phosphoric acid.

Ortho
None of these
Meta
Pyro

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Fertiliser Technology
Nitrolime is chemically known as

None of these
Ammonium nitrate
Calcium ammonium nitrate (CAN)
Calcium nitrate

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