Discussion
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- Question
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
Options- A. carbonate
- B. phosphate
- C. bicarbonate
- D. silicate
- Correct Answer
- carbonate
- 1. Reaction of orthophosphoric acid with soda ash produces
Options- A. sodium tripolyphosphate (STPP)
- B. tricresyl phosphate
- C. tributyl phosphate
- D. nitrophosphate Discuss
- 2. Urea is represented as
Options- A. NH2.CO.NH2
- B. NH3CO.CH3
- C. NH.CO2.NH
- D. NH3.CO2.NH3 Discuss
- 3. Phosphoric acid is produced in wet process from phosphate rock and
Options- A. dilute H2SO4
- B. concentrated H2SO4
- C. concentrated NHO3
- D. concentrated HCl Discuss
- 4. Prilling tower is found in the flowsheet for the manufacture of
Options- A. ammonia
- B. urea
- C. superphosphate
- D. triple superphosphate Discuss
- 5. The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
Options- A. 60
- B. 30
- C. 95
- D. 100 Discuss
- 6. Base suspension fertiliser essentially contains
Options- A. 13% N2 and 43% P2O5
- B. 43% N2 and 13% P2O5
- C. 43% N2 and 13% K2O
- D. 43% K2O and 43% P2O5 Discuss
- 7. H3PO4 is the chemical formula of __________ phosphoric acid.
Options- A. pyro
- B. ortho
- C. meta
- D. none of these Discuss
- 8. Action of phosphoric acid on rock phosphate produces
Options- A. superphosphate
- B. triple superphosphate
- C. nitrophosphate
- D. diammonium phosphate Discuss
- 9. Red phosphorous is changed into white phosphorous by
Options- A. heating in presence of light.
- B. melting under pressure.
- C. vaporisation followed by condensation.
- D. none of these. Discuss
- 10. Hydrogen content of coke oven gas is __________ percent.
Options- A. 4
- B. 22
- C. 58
- D. 84 Discuss
Fertiliser Technology problems
Search Results
Correct Answer: sodium tripolyphosphate (STPP)
Correct Answer: NH2.CO.NH2
Correct Answer: dilute H2SO4
Correct Answer: urea
Correct Answer: 60
Correct Answer: 13% N2 and 43% P2O5
Correct Answer: ortho
Correct Answer: triple superphosphate
Correct Answer: vaporisation followed by condensation.
Correct Answer: 58
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