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1) 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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2) Triple superphosphate is chemically represented as_____________________? a. CaF2.3Ca3(PO4)2 b. 3Ca3(PO4)2 c. Ca(PO3)2 d. Ca(H2PO4)2
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3) Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the _______________ process? a. Haber’s b. Stengel c. Le-chatelier’s d. Du-pont’s
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4) Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of_____________ percent concentration? a. 25-28 b. 52-54 c. 75-80 d. > 98
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5) Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature___________________? a. Rate of reaction is very low b. Very high pressure is required resulting in costly pressure vessel c. Space velocity of gas is very low resulting in decreased conversion d. None of these
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6) Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content? a. N2 b. KNO3 c. NO2 d. NHO3
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7) Base suspension fertiliser essentially contains___________________? a. 13% N2 and 43% P2O5 b. 43% N2 and 13% P2O5 c. 43% N2 and 13% K2O d. 43% K2O and 43% P2O5
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8) The main constituent of rock phosphate is _____________________? a. Mono-calcium phosphate b. Di-calcium phosphate c. Fluorspar d. None of these
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9) Potassic fertilisers do not promote the development of ______________________? a. Stems & leaves during early stage of plant growth b. Starches of potatoes & grains c. Sugar of fruits & vegetables d. Fibrous materials of plants
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10) Heating of ortho-phosphoric acid to 250°C produces___________________? a. Meta-phosphoric acid b. Pyrophosphoric acid c. No change in it d. None of these
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11) Chemical formula of biuret is_________________? a. NH2.CO.NH2 b. NH3.COO.NH3 c. NH2CONHCONH2 d. NH4COONH2
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12) Ammonia synthesis gas is produced from natural gas by___________________? a. Thermal cracking b. Steam reforming c. Partial oxidation d. Hydrogenation
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13) In an ammonia plant, the purge off is essential to___________________? a. Maintain inert gas concentration within a limit b. Remove excess poisonous gases c. Maintain H2 : N2 ratio at 3 :1 d. Remove uncondensed ammonia vapour
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14) Superphosphate is manufactured by reacting phosphate rock with_____________________? a. Acetic acid b. Sulphuric acid c. Aluminium chloride d. None of these
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15) Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ? a. Calcium nitrate b. Calcium ammonium nitrate (CAN) c. Urea d. Ammonium sulphate
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16) In _____________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed? a. Fauser-Montecatini b. Claude c. Uhde d. Kellogg
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17) Vetrocoke solution is_________________? a. A mixture of K2CO3 and As2O3 b. K2SO4 c. A mixture of Na2CO3 and As2O3 d. Na2SO4
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18) Ammonia synthesis gas is produced from fuel oil by _________________? a. Steam reforming b. Hydro-cracking c. Partial oxidation d. Hydrogenation
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19) 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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20) Which 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 ? a. Isopropyl alcohol b. Butyl alcohol c. Toluene d. Hexane
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