Fertiliser Technology Questions

• __________ is the undesirable by-product produced in the manufacture of urea.
• Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?
• Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
• 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
• Oxidation of ammonia is
• Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and
• Heating a mixture of phosphate rock, coke and sand in an electric furnace produces
• __________ is not a fertiliser.
• Which of the following fertilisers contains the least percentage of nitrogen?
• Effectiveness of a fertiliser is independent of the
• 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
• P2O5 content in superphosphate is about __________ percent.
• Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits?
• In the manufacture of orthophosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable
• Out of the following, N2 content is minimum in
• In an ammonia plant, the purge off is essential to
• Urea is a better fertilizer than ammonium sulphate, because
• A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
• Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
• Potassic fertilisers