Fertiliser Technology - Chemical Engineering Questions and Answers

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Gas based fertiliser plants use

natural gas as a source of hydrogen.

natural gas as heating medium.

coal gas as a source of hydrogen.

coal gas as heating medium.

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Catalyst used in steam reforming of naphtha is

bauxite

cobalt

nickel oxide on alumina support

chromium

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Which of the following fertilisers contains the least percentage of nitrogen?

Liquid ammonia

Urea

Ammonium phosphate

Ammonium sulphate

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In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process

uses lower grade phosphate rock.

requires lower capital investment in the plant.

produces lower purity acid.

is very costly.

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Oxidation of ammonia is

exothermic

endothermic

non-catalytic

autocatalytic

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Reaction of orthophosphoric acid with phosphate rock produces

superphosphate

triple superphosphate

metaphosphoric acid

monoammonium phosphate

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Flushing liquor used for cooling coke oven gas constitutes of

ammoniacal liquor

K₂CO₃ solution

dilute H₂SO₄

dilute HCl

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Temperature and pressure in ammonia converter is

200 atm, 1000°C

450 atm, 200°C

450 atm, 550°C

450 atm, 1000°C

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pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.

4-5

7-8

9-10

12-13