| 36. | 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. |
| View Answer Report Discuss 50-50! |
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Answer: (b).adversely affects the yield of urea.
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| 37. | Hydrogen content of coke oven gas is __________ percent. |
| a. | 4 |
| b. | 22 |
| c. | 58 |
| d. | 84 |
| View Answer Report Discuss 50-50! |
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Answer: (c).58
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| 38. | 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. |
| View Answer Report Discuss 50-50! |
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Answer: (c).Red phosphorous is the most reactive allotropic form of phosphorous.
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| 39. | 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. |
| View Answer Report Discuss 50-50! |
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Answer: (c).avoid the risk of explosion.
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| 40. | Action of phosphoric acid on rock phosphate produces |
| a. | superphosphate |
| b. | triple superphosphate |
| c. | nitrophosphate |
| d. | diammonium phosphate |
| View Answer Report Discuss 50-50! |
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Answer: (b).triple superphosphate
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