Catalyst used in desulphurisation of naphtha is
A. Co-Mo
B. Pt-Rh
C. Silica gel
D. Nickel
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Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?
A. H2 separation from coke oven gas
B. Steam reforming of naphtha
C. Cracking of natural gas
D. Electrolysis of water
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Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.
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Fauser Monte Catini converter is used for
A. Ammonia synthesis (e.g. at FCI Sindri)
B. Methanation of CO and CO2
C. Shift conversion (i.e. CO to CO2 )
D. None of these
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Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.
A. Catalytic
B. Endothermic
C. Exothermic
D. Autocatalytic
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P2 O5 content in triple superphosphate is about __________ percent.
A. 42 - 50
B. 15 - 20
C. 85 - 90
D. 70 - 75
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Yield of elemental phosphorous from rock phosphate is about __________ percent.
A. 1-2
B. 15-25
C. 40-45
D. 60-65
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P2 O5 content in superphosphate is about __________ percent.
A. 30 - 35
B. 15 - 20
C. 65 - 70
D. 85 - 90
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Triple superphosphate is chemically represented as
A. CaF2 .3Ca3 (PO4 )2
B. 3Ca3 (PO4 )2
C. Ca(PO3 )2
D. Ca(H2 PO4 )2
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Tricresyl phosphate is chemically represented as
A. (CH3 C6 H4 )3 PO4
B. Ca10 (PO4 ) 3F6
C. (NH4 )2 HPO4
D. NH4 H2 PO4
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Reaction of phosphate rock with 98% H2 SO4 produces
A. Orthophosphoric acid
B. Superphosphate
C. White phosphorous
D. None of these
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Reaction of calcium fluorapatite with sulphuric acid produces
A. Ortho-phosphoric acid
B. Simple superphosphate
C. Triple superphosphate
D. Red phosphorous
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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
A. Low bulk density product
B. Biuret formation
C. Non-spherical prills
D. Substantially wet non-flowing and sticky product
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Urea is a __________ fertiliser.
A. Nitrogenous
B. Potassic
C. Phosphatic
D. None of these
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Pick out the wrong statement.
A. 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid
B. Chemically unreactive nature of red phosphorous is due to its polymeric structure
C. Red phosphorous is the most reactive allotropic form of phosphorous
D. Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation
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Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
A. Nitrogeneous fertiliser
B. Potassic fertiliser
C. Phosphatic fertiliser
D. None of these
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__________ is the undesirable by-product produced in the manufacture of urea.
A. Ammonium carbonate
B. Biuret
C. Carbon dioxide
D. Ammonium carbamate
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In the manufacture of H3 PO4 (ortho); strong H2 SO4 leaching wet process as compared to electric furnace process
A. Uses lower grade phosphate rock
B. Requires lower capital investment in the plant
C. Produces lower purity acid
D. Is very costly
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NPK fertiliser is a __________ fertiliser.
A. Complex
B. Mixed
C. Nitrogenous
D. Phosphatic
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Raw materials for urea production are
A. CO2 and N2
B. CO2 , H2 and N2
C. NH3 and CO
D. HNO3 and CaCO3
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