Q121
Open questionHeating a mixture of phosphate rock, coke and sand in an electric furnace produces
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Fertiliser Technology
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Q122
Open questionIn the manufacture of orthophosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable
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Q123
Open questionWhich of the following is a natural inorganic fertiliser?
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Q124
Open questionWhich of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?
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Q125
Open questionWhich of the following is not a mixed fertiliser?
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Q126
Open questionRed phosphorous is changed into white phosphorous by
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Q127
Open questionWhich nutrient in fertiliser makes the plant stems stronger and increases branching?
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Q128
Open questionNitrolime is
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Q129
Open questionPotassic fertilisers do not promote the development of
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Q130
Open questionH4P2O7 is the chemical formula of __________ phosphoric acid.
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Q131
Open questionMain constituent of phosphate rock is
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Q132
Open questionThe main constituent of rock phosphate is
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Q133
Open questionThe essential ingradient of all the synthesis gas is
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Q134
Open questionIn the manufacture of urea, the intermediate chemical formed is
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Q135
Open questionDuring 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.
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Q136
Open questionAmmonium nitrate (a fertiliser) is coated with limestone powder to
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Q137
Open questionAmmonium sulphate can be produced by reacting gypsum with
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Q138
Open questionP2O5 percentage in the phosphoric acid produced by wet process is about
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Q139
Open questionUrea (a nitrogeneous fertiliser) is produced from carbon dioxide and
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Q140
Open questionHPO3 is the chemical formula of __________ phosphoric acid.
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