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Fertiliser Technology

Fertiliser Technology
Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

Catalytic
Exothermic
Endothermic
Reversible

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

It is cheap
It produces low cost product
Of the better CaO/SiO₂ balance for slag formation
CaO content is less

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Fertiliser Technology
Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

Highly explosive
Complex
Mixed
Highly hygroscopic

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Fertiliser Technology
CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in

Mono-ethanolamine (MEA)
Slaked lime
Ammoniacal liquor
Methyl-Ethyl Ketone (MEK)

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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.

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

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

Increases the yield of urea
Reduces the evaporator load by diluting the urea solution
Adversely affects the yield of urea
Does not affect the yield of urea

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