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Fertiliser Technology

Fertiliser Technology
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

Hydrochloric
Neither A nor B
Either A or B
Sulphuric

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Fertiliser Technology
Rock phosphate constitutes mainly of

Mono-calcium phosphate
Di-calcium phosphate
Fluorapatite
Di-ammonium phosphate

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Fertiliser Technology
Catalyst used in the manufacture of NH₃ by Haber's process is finely divided

Nickel
Alumina
Iron
Vanadium pentoxide

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Fertiliser Technology
Oxidation of ammonia is

Exothermic
Autocatalytic
Non-catalytic
Endothermic

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Fertiliser Technology
Biuret formation in urea is kept at minimum (< 1 %), because it is

Explosive in nature
Corrosive in nature
Toxic and harmful to some crops
Helpful in decomposition of urea

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Fertiliser Technology
Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

All of these
Electrolysis of water
Cryogenic separation of hydrogen from coke oven gas
Steam reforming of naphtha and cracking of natural gas

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