Fertiliser Technology problems
- 1. In the manufacture of urea, the intermediate chemical formed is
Options- A. biuret
- B. ammonium carbamate
- C. ammonium carbonate
- D. none of these Discuss
Correct Answer: ammonium carbamate
- 2. Phosphatic fertiliser is graded based on its __________ content.
Options- A. P2O3
- B. PCl5
- C. P2O5
- D. H3PO4 Discuss
Correct Answer: P2O5
- 3. Which of the following is not a measure component necessarily to be present in fertilisers?
Options- A. Nitrogen
- B. Potassium
- C. Phosphorous
- D. Sulphur Discuss
Correct Answer: Sulphur
- 4. Ammonium nitrate is
Options- 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. Discuss
Correct Answer: mixed with limestone powder to reduce its explosive nature before using it as a fertilizer.
- 5. Nitric acid is produced on commercial scale in a fertiliser plant by
Options- A. oxidation of ammonia.
- B. CaNO3 + H2SO4 reaction.
- C. passing air through high voltage electric arc.
- D. none of these. Discuss
Correct Answer: oxidation of ammonia.
- 6. Reaction of __________ acid with phosphate rock produces superphosphates.
Options- A. hydrochloric
- B. sulphuric
- C. nitric
- D. phosphoric Discuss
Correct Answer: sulphuric
- 7. Low grade phosphate rock can be used in electrical furnace, because
Options- A. of the better CaO/SiO2 balance for slag formation.
- B. CaO content is less.
- C. it is cheap.
- D. it produces low cost product. Discuss
Correct Answer: of the better CaO/SiO2 balance for slag formation.
- 8. Catalyst used in the oxidation of ammonia is
Options- A. platinum-beryllium
- B. platinum-rhodium
- C. cobalt-molybdenum
- D. platinum-molybdenum Discuss
Correct Answer: platinum-rhodium
- 9. Temperature and pressure in urea autoclave is
Options- A. 120°C and 300 atm.
- B. 190°C and 200 atm.
- C. 400°C and 550 atm.
- D. 200°C and 10 atm. Discuss
Correct Answer: 190°C and 200 atm.
- 10. Nitrolime is
Options- A. calcium nitrate.
- B. calcium ammonium nitrate.
- C. a mixture of nitric acid and lime.
- D. a mixture of ammonium nitrate and calcium nitrate. Discuss
Correct Answer: calcium ammonium nitrate.
More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.