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1) Raw materials for nitric acid manufacture are___________________? a. Hydrogen peroxide, air and water b. Anhydrous ammonia and air c. Anhydrous ammonia, air and water d. Wet ammonia, air and water
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2) Plant tranquillisers___________________? a. Hold back stem growth and halt plants at a desired height b. Cause early maturation of plants c. Accelerate ripening of food and grain d. Produce seedless fruit
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3) Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________? a. Urea b. Ammonium nitrate c. Calcium ammonium nitrate (CAN) d. Ammonium sulphate
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4) Nitrogen content of urea is about _____________ percent ? a. 10 b. 46 c. 80 d. 94
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5) With increases in pressure, the conversion of Ammonium carbamate into urea___________________? a. Increases b. Decreases c. Remains unaltered d. Can either increase or decrease depends on biuret content
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6) Nitric acid is produced on commercial scale in a fertiliser plant by___________________? a. Oxidation of ammonia b. CaNO3 + H2SO4 reaction c. Passing air through high voltage electric arc d. None of these
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7) In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________? a. Low pressure b. High pressure c. Very high temperature d. Atmospheric pressure; as the pressure has no effect on conversion
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8) Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces____________________? a. Ammonium phosphate b. Superphosphate c. Triple superphosphate d. None of these
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9) -10-5 fertilisers mean that they contain______________? a. 5, 10, 5% respectively of N2, P2O5 and K2O b. Only 5 to 10% active fertiliser constituents c. 5 to 10% filler & carrier of soil conditioners d. None of these
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10) H4P2O7 is the chemical formula of _____________ phosphoric acid? a. Pyro b. Ortho c. Meta d. None of these
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11) Catalytic ammonia synthesis reaction as in Haber’s process is_________________? a. Endothermic b. Exothermic c. Irreversible d. None of these
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12) Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ? a. Urea b. CAN c. Ammonium sulphate d. Calcium cyanamide
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13) The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is _____________ fertiliser? a. Nitrogenous b. Phosphatic c. Potassic d. None of these
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14) Triple superphosphate is made by reacting phosphate rock with _____________ acid? a. Phosphoric b. Nitric c. Sulphuric d. Hydrochloric
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15) ____________ catalyst is used in the production of urea from CO2 and NH3? a. Vanadium pentoxide b. No c. Alumina d. Nickel
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16) Ammonium nitrate is___________________? a. Having about 40% N2 b. Not hygroscopic c. Not prone to explosive thermal decomposition d. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
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17) Tricresyl phosphate is chemically represented as___________________? a. (CH3 C6 H4)3 PO4 b. Ca10(PO4)3F6 c. (NH4)2HPO4 d. NH4H2PO4
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18) Nitrolime is___________________? a. Calcium nitrate b. Calcium ammonium nitrate c. A mixture of nitric acid and lime d. A mixture of ammonium nitrate and calcium nitrate
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19) Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________? a. Comparatively higher pressure drop b. High cost of the high pressure vessel used for the reactor c. Higher pumping cost d. Chances of entrainment and disturbance of catalyst bed
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20) Steam reforming of naphtha produces ammonia synthesis gas. This is a/an ____________ process? a. Autocatalytic b. Endothermic c. Exothermic d. Non-catalytic
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