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Fertiliser Technology
Quiz 1
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Q.1
Ammonium nitrate (a fertiliser) is coated with limestone powder to
Increase its nitrogen content
Cut down its production cost
Avoid the risk of explosion
Add extra nutrient as fertiliser
Q.2
Ammonium sulphate can be produced by reacting gypsum with
Ammonia
Ammonium carbonate
Nitric acid
None of these
Q.3
P₂O₅ percentage in the phosphoric acid produced by wet process is about
10
30
50
70
Q.4
Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and
Nitric acid
Ammonia
Ammonium nitrate
Nitric oxide
Q.5
HPO₃ is the chemical formula of __________ phosphoric acid.
Pyro
Ortho
Meta
None of these
Q.6
Main constituent of phosphate rock is
Ammonium phosphate
Flour apatite
Calcium fluoride
Calcium phosphate
Q.7
The main constituent of rock phosphate is
Mono-calcium phosphate
Di-calcium phosphate
Fluorspar
None of these
Q.8
The essential ingradient of all the synthesis gas is
H₂
O₂
CO₂
N₂
Q.9
In the manufacture of urea, the intermediate chemical formed is
Biuret
Ammonium carbamate
Ammonium carbonate
None of these
Q.10
During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH₃ to NO is about __________ percent.
38
68
82
98
Q.11
Ammonium phosphate is a __________ fertiliser.
Nitrogenous
Phosphatic
Complex
Mixed
Q.12
Phosphatic fertiliser is graded based on its __________ content.
P₂O₃
PCl5
P₂O₅
H₃PO₄
Q.13
Promoter used in NH₃ synthesis catalyst is
K₂O
SiO₃
V₂O₅
U₂O₃
Q.14
Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.
25-28
52-54
75-80
> 98
Q.15
Reaction of dilute sulphuric acid with phosphate rock produces
Phosphoric acid
Superphosphate
Triple superphosphate
Gypsum
Q.16
Reaction of orthophosphoric acid with phosphate rock produces
Superphosphate
Triple superphosphate
Metaphosphoric acid
Monoammonium phosphate
Q.17
Reaction of nitric acid and sulphuric acid with phosphate rock produces
Nitrophosphate
Diammonium phosphate
Tricresyl phosphate
Tributyl phosphate
Q.18
Gas based fertiliser plants use
Natural gas as a source of hydrogen
Natural gas as heating medium
Coal gas as a source of hydrogen
Coal gas as heating medium
Q.19
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
Q.20
Triple superphosphate is made by reacting phosphate rock with __________ acid.
Phosphoric
Nitric
Sulphuric
Hydrochloric
Q.21
Catalyst used in desulphurisation of naphtha is
Co-Mo
Pt-Rh
Silica gel
Nickel
Q.22
Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?
H? separation from coke oven gas
Steam reforming of naphtha
Cracking of natural gas
Electrolysis of water
Q.23
A phosphatic fertiliser contains 16% P₂O₅. It could be
Dicalcium phosphate
Superphosphate
Triple superphosphate
None of these
Q.24
Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it
Has a pungent smell
Vaporises at normal temperature
Is toxic and highly corrosive
Is in short supply
Q.25
Catalytic ammonia synthesis reaction as in Haber's process is
Endothermic
Exothermic
Irreversible
None of these
Q.26
Which is a catalyst promoter used in catalytic ammonia synthesis reaction?
Al₂O₃
Cr₂O₃
K₂O
MnO
Q.27
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
Q.28
Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.
10
25
50
80
Q.29
Fauser Monte Catini converter is used for
Ammonia synthesis (e.g. at FCI Sindri)
Methanation of CO and CO₂
Shift conversion (i.e. CO to CO₂)
None of these
Q.30
Catalyst used in Haber's process for ammonia production is
Reduced iron oxide
Nickel
Vanadium pentoxide
Silica gel
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