Chemical Engineering - Fertiliser Technology
Exercise :: Fertiliser Technology - Section 1
| 11. |
During conversion of ammonium carbamate into urea, presence of large excess of water |
| A. |
increases the yield of urea. | | B. |
adversely affects the yield of urea. | | C. |
reduces the evaporator load by diluting the urea solution. | | D. |
does not affect the yield of urea. |
Answer: Option B
Explanation:
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| 12. |
Hydrogen content of coke oven gas is __________ percent. |
Answer: Option C
Explanation:
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| 13. |
Pick out the wrong statement. |
| A. |
'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid. | | B. |
Chemically unreactive nature of red phosphorous is due to its polymeric structure. | | C. |
Red phosphorous is the most reactive allotropic form of phosphorous. | | D. |
Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation. |
Answer: Option C
Explanation:
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| 14. |
Ammonium nitrate (a fertiliser) is coated with limestone powder to |
| A. |
increase its nitrogen content. | | B. |
cut down its production cost. | | C. |
avoid the risk of explosion. | | D. |
add extra nutrient as fertiliser. |
Answer: Option C
Explanation:
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| 15. |
Action of phosphoric acid on rock phosphate produces |
| A. |
superphosphate | | B. |
triple superphosphate | | C. |
nitrophosphate | | D. |
diammonium phosphate |
Answer: Option B
Explanation:
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