FERTILISER TECHNOLOGY QUIZ

Maximum stability of white phosphorous is at

Very high pressure

Atmospheric pressure

>600°C

Room temperature

TRUE ANSWER : ?
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Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is

Exothermic

Autocatalytic

None of these

Endothermic

TRUE ANSWER : ?
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Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

Cryogenic separation of hydrogen from coke oven gas

Electrolysis of water

Steam reforming of naphtha and cracking of natural gas

All of these

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YOUR ANSWER : ?

Superphosphate is manufactured by reacting phosphate rock with

Sulphuric acid

Acetic acid

Aluminium chloride

None of these

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__________ is the undesirable by-product produced in the manufacture of urea.

Biuret

Ammonium carbamate

Carbon dioxide

Ammonium carbonate

TRUE ANSWER : ?
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Prilling tower is found in the flowsheet for the manufacture of

Superphosphate

Ammonia

Urea

Triple superphosphate

TRUE ANSWER : ?
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Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

Ammonia

Ammonium nitrate

Nitric oxide

Nitric acid

TRUE ANSWER : ?
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Chemical formula of metaphosphoric acid is

H₃PO₄

H₄P₂O₇

Same as that of pyrophosphoric acid

HPO₃

TRUE ANSWER : ?
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Tricresyl phosphate is chemically represented as

(CH₃ C₆ H₄)₃ PO₄

Ca₁₀(PO₄)3F₆

NH₄H₂PO₄

(NH₄)₂HPO₄

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

It produces low cost product

CaO content is less

Of the better CaO/SiO₂ balance for slag formation

It is cheap

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