Fertiliser Technology - Chemical Engineering Questions and Answers

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Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

250-300

500-750

950-1050

1400-1450

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Ammonia synthesis gas is produced from natural gas by

Thermal cracking

Steam reforming

Partial oxidation

Hydrogenation

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

Oxidation of ammonia

CaNO₃ + H₂SO₄ reaction

Passing air through high voltage electric arc

None of these

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Potassic fertiliser is graded based on its __________ content.

KCl

K₂O

KNO₃

K₂SO₄

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Phosphatic fertiliser is graded based on its __________ content.

P₂O₃

PCl5

P₂O₅

H₃PO₄

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During conversion of ammonium carbamate into urea, presence of large excess of water

Increases the yield of urea

Adversely affects the yield of urea

Reduces the evaporator load by diluting the urea solution

Does not affect the yield of urea

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Which of the following fertilisers is used as a cattle feed?

Urea

Calcium ammonium nitrate

Superphosphate

Ammonium sulphate

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Rock phosphate used for the production of phosphatic fertiliser is mined at

Amjhor (Jharkhand)

Talchar (Orissa)

Bailladella (M.P.)

Kiriburu (Bihar)

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Heating of orthophosphoric acid to 250°C produces

Metaphosphoric acid

Pyrophosphoric acid

No change in it

None of these