Discussion
Home ‣ Chemical Engineering ‣ Fertiliser Technology Comments
- Question
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
- Correct Answer
- biuret formation
- 1. 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
- 2. 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
- 3. __________ is the undesirable by-product produced in the manufacture of urea.
Options- A. Ammonium carbonate
- B. Biuret
- C. Carbon dioxide
- D. Ammonium carbamate Discuss
- 4. Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.
Options- A. 250-300
- B. 500-750
- C. 950-1050
- D. 1400-1450 Discuss
- 5. Chemical formula of metaphosphoric acid is
Options- A. H3PO4
- B. H4P2O7
- C. HPO3
- D. same as that of pyrophosphoric acid Discuss
- 6. Oxidation of ammonia is
Options- A. exothermic
- B. endothermic
- C. non-catalytic
- D. autocatalytic Discuss
- 7. Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and
Options- A. nitric acid
- B. ammonia
- C. ammonium nitrate
- D. nitric oxide Discuss
- 8. 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 Discuss
- 9. __________ is not a fertiliser.
Options- A. Calcium ammonium nitrate
- B. Ferrous sulphate
- C. Liquid ammonia
- D. Ammonium sulphate Discuss
- 10. Which of the following fertilisers contains the least percentage of nitrogen?
Options- A. Liquid ammonia
- B. Urea
- C. Ammonium phosphate
- D. Ammonium sulphate Discuss
Fertiliser Technology problems
Search Results
Correct Answer: either (a) or (b)
Correct Answer: High pressure, high reactants concentration, low temperature.
Correct Answer: Biuret
Correct Answer: 1400-1450
Correct Answer: HPO3
Correct Answer: exothermic
Correct Answer: ammonia
Correct Answer: phosphorous
Correct Answer: Ferrous sulphate
Correct Answer: Ammonium phosphate
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.