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Fertiliser Technology

Fertiliser Technology
Catalyst used in the oxidation of ammonia is

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

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Fertiliser Technology
Ammonia synthesis reaction is

Exothermic
None of these
Endothermic
Autocatalytic

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Fertiliser Technology
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

Increasing the effectiveness
Improving the strength & heat resistance
Stabilisation
All of these

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Fertiliser Technology
Base suspension fertiliser essentially contains

43% N₂ and 13% P₂O₅
43% K₂O and 43% P₂O₅
13% N₂ and 43% P₂O₅
43% N₂ and 13% K₂O

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Fertiliser Technology
Reaction of phosphate rock with 98% H₂SO₄ produces

Superphosphate
None of these
Orthophosphoric acid
White phosphorous

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Fertiliser Technology
Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.

Catalytic
Endothermic
Autocatalytic
Exothermic

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