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Fertiliser Technology
Quiz 6
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Q.1
Rock phosphate used for the production of phosphatic fertiliser is mined at
Amjhor (Jharkhand)
Talchar (Orissa)
Bailladella (M.P.)
Kiriburu (Bihar)
Q.2
Reaction of calcium fluorapatite with sulphuric acid produces
Ortho-phosphoric acid
Simple superphosphate
Triple superphosphate
Red phosphorous
Q.3
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
Low bulk density product
Biuret formation
Non-spherical prills
Substantially wet non-flowing and sticky product
Q.4
Urea is a __________ fertiliser.
Nitrogenous
Potassic
Phosphatic
None of these
Q.5
Hydrogen content of coke oven gas is __________ percent.
4
22
58
84
Q.6
Vetrocoke solution is
A mixture of K₂CO₃ and As₂O₃
K₂SO₄
A mixture of Na₂CO₃ and As₂O₃
Na₂SO₄
Q.7
Ammonia synthesis gas is produced from fuel oil by
Steam reforming
Hydrocracking
Partial oxidation
Hydrogenation
Q.8
Effectiveness of a fertiliser is independent of the
Nature of soil
Type of crop
PH of soil
None of these
Q.9
Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by
Adsorption on palladium
Cryogenic operations (low temperature cooling)
Absorption (using ethanolamine or pyragalloll solution)
None of these
Q.10
__________ catalyst is used in the production of urea from CO₂ and NH₃.
Vanadium pentoxide
No
Alumina
Nickel
Q.11
Nitrolime is chemically known as
Calcium nitrate
Ammonium nitrate
Calcium ammonium nitrate (CAN)
None of these
Q.12
Which is the most suitable fertiliser for paddy?
CAN
Ammonium sulphate
Ammonium nitrate
Superphosphate
Q.13
The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
60
30
95
100
Q.14
Naphtha in a fertiliser plant is used as a source of
Fuel
H₂
N₂
O₂
Q.15
Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.
N₂
KNO₃
NO₂
NHO₃
Q.16
Phosphoric acid is produced in wet process from phosphate rock and
Dilute H₂SO₄
Concentrated H₂SO₄
Concentrated NHO₃
Concentrated HCl
Q.17
Heating of orthophosphoric acid to 250°C produces
Metaphosphoric acid
Pyrophosphoric acid
No change in it
None of these
Q.18
Pick out the wrong statement.
'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid
Chemically unreactive nature of red phosphorous is due to its polymeric structure
Red phosphorous is the most reactive allotropic form of phosphorous
Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation
Q.19
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.
250-300
500-750
950-1050
1400-1450
Q.20
Ammonia synthesis gas is produced from natural gas by
Thermal cracking
Steam reforming
Partial oxidation
Hydrogenation
Q.21
Nitric acid is produced on commercial scale in a fertiliser plant by
Oxidation of ammonia
CaNO₃ + H₂SO₄ reaction
Passing air through high voltage electric arc
None of these
Q.22
Two gas based fertiliser plants are located in
Maharashtra and Gujarat
Maharashtra and Orissa
Gujarat and Madhya Pradesh
Jharkhand and Chattisgarh
Q.23
Which of the following does not come under the category of 'secondary nutrient' for plant growth?
Calcium
Magnesium
Sulphur
Oxygen
Q.24
Which of the following does not come under the category of'primary nutrient' for plant growth?
Potassium
Nitrogen
Phosphorous
Sulphur
Q.25
Urea is formed only
In liquid phase
In vapour phase
At very high temperature
At very low pressure (vacuum)
Q.26
Urea is represented as
NH₂.CO.NH₂
NH₃CO.CH₃
NH.CO₂.NH
NH₃.CO₂.NH₃
Q.27
A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
Salt & coke
Sand & coke
And coke
And sand
Q.28
Fertiliser produced during soda ash manufacture by dual process is ammonium
Chloride
Sulphate
Nitrate
None of these
Q.29
__________ is required more for leafy crops.
Nitrogen
Phosphorous
Potassium
Carbon
Q.30
In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.
Fauser-Monte Catini
Claude
Udhe
Kellog
0 h : 0 m : 1 s
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