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Fertiliser Technology

Fertiliser Technology
Promoter used in NH₃ synthesis catalyst is

K₂O
U₂O₃
V₂O₅
SiO₃

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Fertiliser Technology
Which is the best fertiliser for paddy?

Superphosphate
Potassium nitrate
Ammonium sulphate
Nitro-phosphate

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Fertiliser Technology
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?

Urea
Ammonium sulphate
Calcium ammonium nitrate (CAN)
Calcium nitrate

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Fertiliser Technology
Ammonium nitrate (a fertiliser) is coated with limestone powder to

Add extra nutrient as fertiliser
Increase its nitrogen content
Cut down its production cost
Avoid the risk of explosion

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Fertiliser Technology
Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

Has a pungent smell
Is in short supply
Is toxic and highly corrosive
Vaporises at normal temperature

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

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

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