Discussion
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- Question
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.
- Correct Answer
- phosphorous.
- 1. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.
Options- A. exothermic
- B. endothermic
- C. autocatalytic
- D. catalytic Discuss
- 2. Potassic fertilisers
Options- A. are useful during early stage of the plant growth.
- B. stimulate early growth and accelerate seeding.
- C. help in development of starches of potatoes and grain.
- D. none of these. Discuss
- 3. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
Options- A. osmotic pressure of the soil water becomes less than that of the plant sap.
- B. soil becomes too alkaline.
- C. osmotic pressure of the soil water becomes higher than that of the plant sap.
- D. soil becomes too acidic. Discuss
- 4. A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
Options- A. salt & coke
- B. sand & coke
- C. and coke
- D. and sand Discuss
- 5. Urea is a better fertilizer than ammonium sulphate, because
Options- A. it is cheaper.
- B. nitrogen content is higher.
- C. it is not poisonous.
- D. it is easy to manufacture. Discuss
- 6. 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
- 7. Nitrolime is chemically known as
Options- A. calcium nitrate
- B. ammonium nitrate
- C. calcium ammonium nitrate (CAN)
- D. none of these Discuss
- 8. The main constituent of rock phosphate is
Options- A. mono-calcium phosphate
- B. di-calcium phosphate
- C. fluorspar
- D. none of these Discuss
- 9. 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
- 10. 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
Fertiliser Technology problems
Search Results
Correct Answer: endothermic
Correct Answer: help in development of starches of potatoes and grain.
Correct Answer: osmotic pressure of the soil water becomes higher than that of the plant sap.
Correct Answer: sand & coke
Correct Answer: nitrogen content is higher.
Correct Answer: natural
Correct Answer: calcium ammonium nitrate (CAN)
Correct Answer: di-calcium phosphate
Correct Answer: all (a), (b) and (c)
Correct Answer: its activity declines rapidly, if heated to above 520°C.
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