FERTILISER TECHNOLOGY QUIZ

Flushing liquor used for cooling coke oven gas constitutes of

Dilute H₂SO₄

Dilute HCl

Ammoniacal liquor

K₂CO₃ solution

TRUE ANSWER : ?
YOUR ANSWER : ?

Urea is a __________ fertiliser.

Potassic

Nitrogenous

Phosphatic

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Hydrogen content of coke oven gas is __________ percent.

84

58

22

4

TRUE ANSWER : ?
YOUR ANSWER : ?

Ammonium nitrate is

Having about 40% N₂

Not prone to explosive thermal decomposition

Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

Not hygroscopic

TRUE ANSWER : ?
YOUR ANSWER : ?

Catalyst used in Haber's process for ammonia production is

Silica gel

Vanadium pentoxide

Reduced iron oxide

Nickel

TRUE ANSWER : ?
YOUR ANSWER : ?

P₂O₅ content in triple superphosphate is about __________ percent.

70-75

42-50

15-20

85-90

TRUE ANSWER : ?
YOUR ANSWER : ?

Main constituent of phosphate rock is

Flour apatite

Ammonium phosphate

Calcium fluoride

Calcium phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

5-10-5 fertilisers mean that they contain

None of these

5, 10, 5% respectively of N₂, P₂O₅ and K₂O

Only 5 to 10% active fertiliser constituents

5 to 10% filler & carrier of soil conditioners

TRUE ANSWER : ?
YOUR ANSWER : ?

Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in

Biuret formation

Substantially wet non-flowing and sticky product

Low bulk density product

Non-spherical prills

TRUE ANSWER : ?
YOUR ANSWER : ?

Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

Silicate

Bicarbonate

Carbonate

Phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

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