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Fertiliser Technology
Quiz 3
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Q.1
Catalyst used in steam reforming of naphtha is
Nickel
Platinum
Silica gel
Rhodium
Q.2
Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.
Reversible
Catalytic
Exothermic
Endothermic
Q.3
Sodium tri poly phosphate (STPP) is chemically represented as
Na₅P3O₁₀
Na₄P3O₈
Na₃P4O₆
Na₂PO₄
Q.4
I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at
Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)
Talchar (Orissa) and Ramagundam (A.P.) both under FCI
Korba (M.P.) and Talchar (Orissa) both under FCI
Haldia (W.B) and Namrup (Assam) both under HFC
Q.5
Catalyst used in steam reforming of naphtha is
Bauxite
Cobalt
Nickel oxide on alumina support
Chromium
Q.6
Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits?
Nitrogenous fertilisers
Phosphatic fertilisers
Potassic fertiliser
None of these
Q.7
The optimum size of the ammonia plant is __________ tons/day.
10
100
1000
1000C
Q.8
Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)
Use coal for heating purpose
Gasify coal to get hydrogen from coal gas
Use coal as filler in fertiliser
Use coal as conditioner in fertiliser
Q.9
Temperature and pressure in urea autoclave is
120°C and 300 atm
190°C and 200 atm
400°C and 550 atm
200°C and 10 atm
Q.10
Iron is not used alone as a catalyst in ammonia synthesis, because
Its activity declines rapidly, if heated to above 520°C
It decomposes ammonia
It gets oxidised above 500°C
None of these
Q.11
Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.
5
20
50
65
Q.12
Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at
Rourkela (under SAIL)
Bokaro (under SAIL)
Sindri (under FCI)
Baroda (under G.S.F.C.)
Q.13
Maximum stability of white phosphorous is at
Very high pressure
Atmospheric pressure
Room temperature
>600°C
Q.14
Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH₃
HNO₃ & limestone
CO₂ & H₂SO₄
HNO₃ & NH₄Cl
CO₂ & KNO₃
Q.15
Pick out the wrong statement.
All the nitrogenous fertilisers are not soluble in water
A straight fertiliser contains only one nutrient
Calcium cynamide is used as weed killer in onion fields
The phosphorous nutrient makes the plant stem stronger and increases its branches
Q.16
Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is
Exothermic
Endothermic
Autocatalytic
None of these
Q.17
Which of the following fertilisers contains the least percentage of nitrogen?
Liquid ammonia
Urea
Ammonium phosphate
Ammonium sulphate
Q.18
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
Decreasing the temperature
Increasing the temperature
None of these
Q.19
Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at
Rourkela (under SAIL)
Barauni (under HFC)
Nangal (under NFL)
Talchar (under FCI)
Q.20
Main component of bone ash is
Calcium sulphate
Calcium phosphate
Calcium carbonate
Sodium phosphate
Q.21
Reaction of anhydrous liquid ammonia with orthophosphoric acid produces
Ammonium phosphate
Superphosphate
Triple superphosphate
None of these
Q.22
Catalyst used in the oxidation of ammonia is
Platinum-beryllium
Platinum-rhodium
Cobalt-molybdenum
Platinum-molybdenum
Q.23
NPK means a __________ fertiliser.
Mixed
Potassic
Liquid
Solid
Q.24
5-10-5 fertilisers mean that they contain
5, 10, 5% respectively of N₂, P₂O₅ and K₂O
Only 5 to 10% active fertiliser constituents
5 to 10% filler & carrier of soil conditioners
None of these
Q.25
An increase in the NH₃/CO₂ ratio in urea manufacture results in
Increased degree of conversion of CO₂ to urea
Decreased degree of conversion of NH₃ to urea
Decreased yield of urea
Decreased specific volume of molten mass
Q.26
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of
Phosphoric acid
Superphosphate
Phosphorous
Triple superphosphate
Q.27
Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.
Autocatalytic
Endothermic
Exothermic
Non-catalytic
Q.28
Maximum nitrogen percentage is in
Ammonium sulphate
Calcium ammonium nitrate
Urea
Liquid ammonia
Q.29
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.
Stabilisation
Increasing the effectiveness
Improving the strength & heat resistance
All of the above
Q.30
Rock phosphate constitutes mainly of
Fluorapatite
Di-calcium phosphate
Mono-calcium phosphate
Di-ammonium phosphate
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