Discussion
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- Question
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
- Correct Answer
- 1400-1450
- 1. Chemical formula of metaphosphoric acid is
Options- A. H3PO4
- B. H4P2O7
- C. HPO3
- D. same as that of pyrophosphoric acid Discuss
- 2. In natural gas, the C/H ratio (by weight) varies in the range of
Options- A. 3-4
- B. 8-10
- C. 15-17
- D. 20-25 Discuss
- 3. Low grade coal is __________ to produce ammonia synthesis gas.
Options- A. hydrogenated
- B. liquefied
- C. gasified
- D. dehydrogenated Discuss
- 4. Which is the best fertiliser for paddy?
Options- A. Ammonium sulphate
- B. Nitro-phosphate
- C. Superphosphate
- D. Potassium nitrate Discuss
- 5. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
Options- A. Nitrogeneous fertiliser
- B. Potassic fertiliser
- C. Phosphatic fertiliser
- D. None of these Discuss
- 6. __________ is the undesirable by-product produced in the manufacture of urea.
Options- A. Ammonium carbonate
- B. Biuret
- C. Carbon dioxide
- D. Ammonium carbamate Discuss
- 7. 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
- 8. 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
- 9. 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
- 10. Oxidation of ammonia is
Options- A. exothermic
- B. endothermic
- C. non-catalytic
- D. autocatalytic Discuss
Fertiliser Technology problems
Search Results
Correct Answer: HPO3
Correct Answer: 3-4
Correct Answer: gasified
Correct Answer: Ammonium sulphate
Correct Answer: Nitrogeneous fertiliser
Correct Answer: Biuret
Correct Answer: High pressure, high reactants concentration, low temperature.
Correct Answer: either (a) or (b)
Correct Answer: biuret formation
Correct Answer: exothermic
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