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Fertiliser Technology

Fertiliser Technology
A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

And sand
Salt & coke
And coke
Sand & coke

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Fertiliser Technology
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.

All of these
Increased cost of equipment
Increased biuret formation
High corrosion rate

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Fertiliser Technology
Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.

Water holding capacity
Texture
Nutrient supply
All of these

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Fertiliser Technology
Optimum reaction temperature in steam reforming of naphtha is __________ °C.

1500-1700
300 - 450
100-200
700 - 1000

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Fertiliser Technology
Nitric acid is produced on commercial scale in a fertiliser plant by

None of these
CaNO₃ + H₂SO₄ reaction
Passing air through high voltage electric arc
Oxidation of ammonia

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Fertiliser Technology
Reaction of orthophosphoric acid with phosphate rock produces

Monoammonium phosphate
Superphosphate
Triple superphosphate
Metaphosphoric acid

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