Fertiliser Technology problems
- 1. Rock phosphate constitutes mainly of
Options- A. fluorapatite
- B. di-calcium phosphate
- C. mono-calcium phosphate
- D. di-ammonium phosphate Discuss
Correct Answer: fluorapatite
- 2. Nitrogen content of urea is about __________ percent.
Options- A. 10
- B. 46
- C. 80
- D. 94 Discuss
Correct Answer: 46
- 3. __________ is the most suitable fertiliser for paddy.
Options- A. Urea
- B. Ammonium sulphate
- C. Superphosphate
- D. Potassium nitrate Discuss
Correct Answer: Ammonium sulphate
- 4. Monte catini process is used for the manufacture of
Options- A. nitric acid
- B. phosphoric acid
- C. urea
- D. calcium ammonium nitrate (CAN) Discuss
Correct Answer: urea
- 5. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)
Options- A. use coal for heating purpose.
- B. gasify coal to get hydrogen from coal gas.
- C. use coal as filler in fertiliser.
- D. use coal as conditioner in fertiliser. Discuss
Correct Answer: gasify coal to get hydrogen from coal gas.
- 6. Catalyst used in ammonia synthesis uses __________ as a promoter.
Options- A. Pt
- B. K2O
- C. Al2O3
- D. Ni Discuss
Correct Answer: K2O
- 7. Heating of orthophosphoric acid to about 900°C, produces
Options- A. metaphosphoric acid
- B. pyrophosphoric acid
- C. no change in it
- D. none of these Discuss
Correct Answer: metaphosphoric acid
- 8. Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
Options- A. steam reforming of naphtha and cracking of natural gas.
- B. electrolysis of water.
- C. cryogenic separation of hydrogen from coke oven gas.
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 9. Which of the following gasifiers can be attached to coal based fertiliser plants?
Options- A. Lurgi (high pressure) gasifier.
- B. Kopper-Totzek gasifier.
- C. Gasifier working at 20 atm.
- D. Gasifier working at 40 atm. Discuss
Correct Answer: Kopper-Totzek gasifier.
- 10. Reaction of calcium fluorapatite with sulphuric acid produces
Options- A. ortho-phosphoric acid.
- B. simple superphosphate.
- C. triple superphosphate.
- D. red phosphorous. Discuss
Correct Answer: simple superphosphate.
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