Discussion
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- Question
Heating a mixture of phosphate rock, coke and sand in an electric furnace produces
Options- A. phosphoric acid
- B. ammonium phosphate
- C. phosphorous
- D. superphosphate
- Correct Answer
- phosphorous
- 1. Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and
Options- A. nitric acid
- B. ammonia
- C. ammonium nitrate
- D. nitric oxide Discuss
- 2. Oxidation of ammonia is
Options- A. exothermic
- B. endothermic
- C. non-catalytic
- D. autocatalytic Discuss
- 3. 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
Options- A. low bulk density product
- B. biuret formation
- C. non-spherical prills
- D. substantially wet non-flowing and sticky product Discuss
- 4. Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
Options- A. sulphuric
- B. hydrochloric
- C. either (a) or (b)
- D. neither (a) nor (b) Discuss
- 5. Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?
Options- A. High pressure, low reactants concentration, high temperature.
- B. High pressure, low reactants concentration, low temperature.
- C. High pressure, high reactants concentration, low temperature.
- D. Low pressure, high reactants concentration, low temperature. Discuss
- 6. __________ is not a fertiliser.
Options- A. Calcium ammonium nitrate
- B. Ferrous sulphate
- C. Liquid ammonia
- D. Ammonium sulphate Discuss
- 7. Which of the following fertilisers contains the least percentage of nitrogen?
Options- A. Liquid ammonia
- B. Urea
- C. Ammonium phosphate
- D. Ammonium sulphate Discuss
- 8. Effectiveness of a fertiliser is independent of the
Options- A. nature of soil
- B. type of crop
- C. pH of soil
- D. none of these Discuss
- 9. 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
Options- 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 Discuss
- 10. P2O5 content in superphosphate is about __________ percent.
Options- A. 30-35
- B. 15-20
- C. 65-70
- D. 85-90 Discuss
Fertiliser Technology problems
Search Results
Correct Answer: ammonia
Correct Answer: exothermic
Correct Answer: biuret formation
Correct Answer: either (a) or (b)
Correct Answer: High pressure, high reactants concentration, low temperature.
Correct Answer: Ferrous sulphate
Correct Answer: Ammonium phosphate
Correct Answer: none of these
Correct Answer: rate of reaction is very low.
Correct Answer: 15-20
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