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Fertiliser Technology
Quiz 5
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Q.1
Chemical formula of metaphosphoric acid is
H₃PO₄
H₄P₂O₇
HPO₃
Same as that of pyrophosphoric acid
Q.2
Catalyst used in the manufacture of NH₃ by Haber's process is finely divided
Nickel
Iron
Vanadium pentoxide
Alumina
Q.3
Base suspension fertiliser essentially contains
13% N₂ and 43% P₂O₅
43% N₂ and 13% P₂O₅
43% N₂ and 13% K₂O
43% K₂O and 43% P₂O₅
Q.4
Nitrogen content of a nitrogenous fertiliser is 35%. It could be
Urea
Ammonium nitrate
Calcium ammonium nitrate (CAN)
Ammonium sulphate
Q.5
Flushing liquor used for cooling coke oven gas constitutes of
Ammoniacal liquor
K₂CO₃ solution
Dilute H₂SO₄
Dilute HCl
Q.6
CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in
Mono-ethanolamine (MEA)
Slaked lime
Ammoniacal liquor
Methyl-Ethyl Ketone (MEK)
Q.7
Urea is a better fertilizer than ammonium sulphate, because
It is cheaper
Nitrogen content is higher
It is not poisonous
It is easy to manufacture
Q.8
Which is the best fertiliser for paddy?
Ammonium sulphate
Nitro-phosphate
Superphosphate
Potassium nitrate
Q.9
Temperature and pressure in ammonia converter is
200 atm, 1000°C
450 atm, 200°C
450 atm, 550°C
450 atm, 1000°C
Q.10
Lower temperature and large excess of ammonia in urea melt
Increases biuret formation
Decreases biuret formation
Is undersirable
Does not effect biuret formation
Q.11
Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?
High pressure, low reactants concentration, high temperature
High pressure, low reactants concentration, low temperature
High pressure, high reactants concentration, low temperature
Low pressure, high reactants concentration, low temperature
Q.12
Optimum reaction temperature in steam reforming of naphtha is __________ °C.
700 - 1000
300 - 450
1500-1700
100-200
Q.13
Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
Nitrogeneous fertiliser
Potassic fertiliser
Phosphatic fertiliser
None of these
Q.14
__________ is the undesirable by-product produced in the manufacture of urea.
Ammonium carbonate
Biuret
Carbon dioxide
Ammonium carbamate
Q.15
In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process
Uses lower grade phosphate rock
Requires lower capital investment in the plant
Produces lower purity acid
Is very costly
Q.16
In natural gas, the C/H ratio (by weight) varies in the range of
3-4
8-10
15-17
20-25
Q.17
Out of the following, N₂ content is minimum in
Urea
Ammonium nitrate
Ammonium sulphate
Ammonium chloride
Q.18
Catalyst used in ammonia synthesis uses __________ as a promoter.
Pt
K₂O
Al2O₃
Ni
Q.19
NPK fertiliser is a __________ fertiliser.
Complex
Mixed
Nitrogenous
Phosphatic
Q.20
Raw materials for urea production are
CO₂ and N₂
CO₂, H₂ and N₂
NH₃ and CO
HNO₃ and CaCO₃
Q.21
__________ is the most suitable fertiliser for paddy.
Urea
Ammonium sulphate
Superphosphate
Potassium nitrate
Q.22
During conversion of ammonium carbamate into urea, presence of large excess of water
Increases the yield of urea
Adversely affects the yield of urea
Reduces the evaporator load by diluting the urea solution
Does not affect the yield of urea
Q.23
Reaction of phosphate rock with 98% H₂SO₄ produces
Orthophosphoric acid
Superphosphate
White phosphorous
None of these
Q.24
Superphosphate is manufactured by reacting phosphate rock with
Acetic acid
Sulphuric acid
Aluminium chloride
None of these
Q.25
Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.
Mixed
Complex
Highly hygroscopic
Highly explosive
Q.26
Commercial fertilisers are available mostly in the form of
Powder
Grannules
Lumps
Flakes
Q.27
Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.
Nutrient supply
Texture
Water holding capacity
All of the above
Q.28
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
Osmotic pressure of the soil water becomes less than that of the plant sap
Soil becomes too alkaline
Osmotic pressure of the soil water becomes higher than that of the plant sap
Soil becomes too acidic
Q.29
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?
Water
Naphtha
Tar
Coal/coke oven gas
Q.30
Which of the following fertilisers is used as a cattle feed?
Urea
Calcium ammonium nitrate
Superphosphate
Ammonium sulphate
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