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Fertiliser Technology

Fertiliser Technology
Raw materials for urea production are

CO₂ and N₂
CO₂, H₂ and N₂
NH₃ and CO
HNO₃ and CaCO₃

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Fertiliser Technology
Triple superphosphate is made by reacting phosphate rock with __________ acid.

Nitric
Hydrochloric
Phosphoric
Sulphuric

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Fertiliser Technology
Calcium ammonium nitrate (CAN) is

A complex fertiliser
A mixed fertiliser
Not a fertiliser ; it is an explosive
A straight fertiliser

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Fertiliser Technology
Both white phosphorous as well as red phosphorous

Reacts with hot caustic soda solution to give phosphine
Are soluble in CS₂
All of these
Burns when heated in air

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Fertiliser Technology
An increase in the NH₃/CO₂ ratio in urea manufacture results in

Increased degree of conversion of CO₂ to urea
Decreased specific volume of molten mass
Decreased degree of conversion of NH₃ to urea
Decreased yield of urea

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Fertiliser Technology
Conditioners like finely divided peat are added to the fertiliser to

Increase its solubility
Produce bulk
Counteract burning
Avoid caking & hardening

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