Discussion
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- Question
Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the
Options- A. presence of an inert atmosphere.
- B. presence of a reducing atmosphere.
- C. absence of air.
- D. presence of an oxidising atmosphere.
- Correct Answer
- absence of air.
- 1. Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is
Options- A. exothermic
- B. endothermic
- C. autocatalytic
- D. none of these Discuss
- 2. Flushing liquor used for cooling coke oven gas constitutes of
Options- A. ammoniacal liquor
- B. K2CO3 solution
- C. dilute H2SO4
- D. dilute HCl Discuss
- 3. Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?
Options- A. Electrolysis of water.
- B. Cryogenic removal of H2 from coke oven gas.
- C. Steam reforming of naphtha.
- D. Natural gas cracking. Discuss
- 4. CaH4(PO4)2 is the chemical formula of
Options- A. superphosphate
- B. triple superphosphate
- C. calcium phosphate
- D. meta phosphoric acid Discuss
- 5. A phosphatic fertiliser contains 16% P2O5. It could be
Options- A. dicalcium phosphate
- B. superphosphate
- C. triple superphosphate
- D. none of these Discuss
- 6. Main constituent of phosphate rock is
Options- A. ammonium phosphate
- B. flour apatite
- C. calcium fluoride
- D. calcium phosphate Discuss
- 7. Temperature and pressure in ammonia converter is
Options- A. 200 atm, 1000°C
- B. 450 atm, 200°C
- C. 450 atm, 550°C
- D. 450 atm, 1000°C Discuss
- 8. 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
- 9. Catalyst used in desulphurisation of naphtha is
Options- A. Co-Mo
- B. Pt-Rh
- C. silica gel
- D. nickel Discuss
- 10. 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
Fertiliser Technology problems
Search Results
Correct Answer: exothermic
Correct Answer: ammoniacal liquor
Correct Answer: Electrolysis of water.
Correct Answer: triple superphosphate
Correct Answer: superphosphate
Correct Answer: flour apatite
Correct Answer: 450 atm, 550°C
Correct Answer: vaporises at normal temperature.
Correct Answer: Co-Mo
Correct Answer: produces lower purity acid.
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