FERTILISER TECHNOLOGY QUIZ

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

Toxic and harmful to some crops

Corrosive in nature

Helpful in decomposition of urea

Explosive in nature

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Decreased degree of conversion of NH₃ to urea

Increased degree of conversion of CO₂ to urea

Decreased yield of urea

Decreased specific volume of molten mass

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is the undesirable by-product produced in the manufacture of urea.

Ammonium carbonate

Ammonium carbamate

Biuret

Carbon dioxide

TRUE ANSWER : ?
YOUR ANSWER : ?

Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.

80

10

25

50

TRUE ANSWER : ?
YOUR ANSWER : ?

Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

Its N₂ content is very low

It is not available

It will evaporate on spraying

It is very costly

TRUE ANSWER : ?
YOUR ANSWER : ?

Potassic fertilisers

Stimulate early growth and accelerate seeding

Are useful during early stage of the plant growth

Help in development of starches of potatoes and grain

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical formula of biuret is

NH₂.CO.NH₂

NH₂CONHCONH₂

NH₄COONH₂

NH₃.COO.NH₃

TRUE ANSWER : ?
YOUR ANSWER : ?

Action of phosphoric acid on rock phosphate produces

Nitrophosphate

Triple superphosphate

Superphosphate

Diammonium phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

Lower temperature and large excess of ammonia in urea melt

Decreases biuret formation

Is undersirable

Does not effect biuret formation

Increases biuret formation

TRUE ANSWER : ?
YOUR ANSWER : ?

Catalyst used in Haber's process for ammonia production is

Reduced iron oxide

Nickel

Vanadium pentoxide

Silica gel

TRUE ANSWER : ?
YOUR ANSWER : ?

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