Fertiliser Technology - Chemical Engineering Questions and Answers

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Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because

It is hygroscopic and explosive in nature

It is highly acidic in nature

It is a liquid at room temperature

Its nitrogen content is very less

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

Phosphoric

Nitric

Sulphuric

Hydrochloric

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Which is a catalyst promoter used in catalytic ammonia synthesis reaction?

Al₂O₃

Cr₂O₃

K₂O

MnO

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Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

Rate of reaction is very low

Very high pressure is required resulting in costly pressure vessel

Space velocity of gas is very low resulting in decreased conversion

None of these

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Catalyst used in Haber's process for ammonia production is

Reduced iron oxide

Nickel

Vanadium pentoxide

Silica gel

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Chemical formula of biuret is

NH₂.CO.NH₂

NH₃.COO.NH₃

NH₂CONHCONH₂

NH₄COONH₂

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Action of phosphoric acid on rock phosphate produces

Superphosphate

Triple superphosphate

Nitrophosphate

Diammonium phosphate

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Calcium ammonium nitrate (CAN) is

A mixed fertiliser

A straight fertiliser

A complex fertiliser

Not a fertiliser ; it is an explosive

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Which of the following gasifiers can be attached to coal based fertiliser plants?

Lurgi (high pressure) gasifier

Kopper-Totzek gasifier

Gasifier working at 20 atm

Gasifier working at 40 atm