FERTILISER TECHNOLOGY QUIZ

Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

Decreasing the pressure

Increasing the temperature

None of these

Decreasing the temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Nitrolime is chemically known as

Ammonium nitrate

None of these

Calcium nitrate

Calcium ammonium nitrate (CAN)

TRUE ANSWER : ?
YOUR ANSWER : ?

Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

Catalytic

Autocatalytic

Exothermic

Endothermic

TRUE ANSWER : ?
YOUR ANSWER : ?

Heating of orthophosphoric acid to about 900°C, produces

Pyrophosphoric acid

No change in it

Metaphosphoric acid

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

P₂O₅ content in superphosphate is about __________ percent.

30-35

15-20

65-70

85-90

TRUE ANSWER : ?
YOUR ANSWER : ?

Potassic fertilisers

None of these

Stimulate early growth and accelerate seeding

Are useful during early stage of the plant growth

Help in development of starches of potatoes and grain

TRUE ANSWER : ?
YOUR ANSWER : ?

Iron is not used alone as a catalyst in ammonia synthesis, because

Its activity declines rapidly, if heated to above 520°C

It gets oxidised above 500°C

It decomposes ammonia

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

And sand

Sand & coke

Salt & coke

And coke

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following fertilisers contains the least percentage of nitrogen?

Ammonium phosphate

Urea

Ammonium sulphate

Liquid ammonia

TRUE ANSWER : ?
YOUR ANSWER : ?

Lower temperature and large excess of ammonia in urea melt

Increases biuret formation

Is undersirable

Decreases biuret formation

Does not effect biuret formation

TRUE ANSWER : ?
YOUR ANSWER : ?

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