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Fertiliser Technology

Fertiliser Technology
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

1400-1450
950-1050
250-300
500-750

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

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

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Fertiliser Technology
Catalyst used in steam reforming of naphtha is

Rhodium
Silica gel
Platinum
Nickel

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Fertiliser Technology
A nitrogenous fertiliser contains 20% N₂. It could be

Urea
Ammonium nitrate
Calcium ammonium nitrate (CAN)
Ammonium chloride

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Fertiliser Technology
In ammonia synthesis (N₂ + 3H₂ = 2NH₃), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at

Atmospheric pressure; as the pressure has no effect on conversion
Low pressure
High pressure
Very high temperature

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Fertiliser Technology
5-10-5 fertilisers mean that they contain

None of these
5, 10, 5% respectively of N₂, P₂O₅ and K₂O
5 to 10% filler & carrier of soil conditioners
Only 5 to 10% active fertiliser constituents

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