Fertiliser Technology problems
- 1. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.
Options- A. exothermic
- B. endothermic
- C. autocatalytic
- D. catalytic Discuss
Correct Answer: endothermic
- 2. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of
Options- A. phosphoric acid.
- B. superphosphate.
- C. phosphorous.
- D. triple superphosphate. Discuss
Correct Answer: phosphorous.
- 3. A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia.
Options- A. coke oven
- B. producer
- C. natural
- D. coal Discuss
Correct Answer: natural
- 4. Nitrolime is chemically known as
Options- A. calcium nitrate
- B. ammonium nitrate
- C. calcium ammonium nitrate (CAN)
- D. none of these Discuss
Correct Answer: calcium ammonium nitrate (CAN)
- 5. The main constituent of rock phosphate is
Options- A. mono-calcium phosphate
- B. di-calcium phosphate
- C. fluorspar
- D. none of these Discuss
Correct Answer: di-calcium phosphate
- 6. Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.
Options- A. nutrient supply
- B. texture
- C. water holding capacity
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 7. Iron is not used alone as a catalyst in ammonia synthesis, because
Options- A. its activity declines rapidly, if heated to above 520°C.
- B. it decomposes ammonia.
- C. it gets oxidised above 500°C.
- D. none of these. Discuss
Correct Answer: its activity declines rapidly, if heated to above 520°C.
- 8. An increase in the NH3/CO2 ratio in urea manufacture results in
Options- A. increased degree of conversion of CO2 to urea.
- B. decreased degree of conversion of NH3 to urea.
- C. decreased yield of urea.
- D. decreased specific volume of molten mass. Discuss
Correct Answer: increased degree of conversion of CO2 to urea.
- 9. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?
Options- A. Calcium nitrate
- B. Calcium ammonium nitrate (CAN)
- C. Urea
- D. Ammonium sulphate Discuss
Correct Answer: Urea
- 10. Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?
Options- A. Iso propyl alcohol
- B. Butyl alcohol
- C. Toluene
- D. Hexane Discuss
Correct Answer: Butyl alcohol
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