Fertiliser Technology problems
- 1. Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it
Options- A. has a pungent smell.
- B. vaporises at normal temperature.
- C. is toxic and highly corrosive.
- D. is in short supply. Discuss
Correct Answer: vaporises at normal temperature.
- 2. Catalyst used in desulphurisation of naphtha is
Options- A. Co-Mo
- B. Pt-Rh
- C. silica gel
- D. nickel Discuss
Correct Answer: Co-Mo
- 3. In the manufacture of H3 PO4 (ortho), ; strong H2 SO4 leaching wet process as compared to electric furnace process
Options- A. uses lower grade phosphate rock.
- B. requires lower capital investment in the plant.
- C. produces lower purity acid.
- D. is very costly. Discuss
Correct Answer: produces lower purity acid.
- 4. Biuret formation in urea is kept at minimum (< 1 %), because it is
Options- A. corrosive in nature.
- B. toxic and harmful to some crops.
- C. helpful in decomposition of urea.
- D. explosive in nature. Discuss
Correct Answer: toxic and harmful to some crops.
- 5. Pick out the wrong statement.
Options- A. Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty.
- B. Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis.
- C. Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables.
- D. Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis. Discuss
Correct Answer: Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables.
- 6. A potassic fertiliser contains 50% K2O. It could be
Options- A. potassium sulphate.
- B. potassium chloride.
- C. a mixture of NaCl+ KCl.
- D. none of these. Discuss
Correct Answer: potassium sulphate.
- 7. Raw materials for urea production are
Options- A. CO2 and N2
- B. CO2, H2 and N2
- C. NH3 and CO
- D. HNO3 and CaCO3 Discuss
Correct Answer: CO2, H2 and N2
- 8. Catalyst used in steam reforming of naphtha is
Options- A. bauxite
- B. cobalt
- C. nickel oxide on alumina support
- D. chromium Discuss
Correct Answer: nickel oxide on alumina support
- 9. Which of the following fertilisers is used as a cattle feed?
Options- A. Urea
- B. Calcium ammonium nitrate
- C. Superphosphate
- D. Ammonium sulphate Discuss
Correct Answer: Urea
- 10. Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.
Options- A. mixed
- B. complex
- C. highly hygroscopic
- D. highly explosive Discuss
Correct Answer: complex
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