Chemical Engineering MCQs

6108 MCQs  (Page 502 of 611)

Attempt Chemical Engineering Quiz
Urea is a better fertilizer than ammonium sulphate, because__________________?
A. It is cheaper
B. Nitrogen content is higher
C. It is not posionous
D. It is easy to manufacture
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Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
A. Phosphoric acid
B. Coke
C. Sulphuric acid
D. Silica and coke
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An increase in the NH3/CO2 ratio in urea manufacture results in__________________?
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
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Maximum nitrogen percentage is in________________?
A. Ammonium sulphate
B. Calcium ammonium nitrate
C. Urea
D. Liquid ammonia
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Fertiliser plants get their N2 requirements _____________________?
A. By fractionation of liquefied air
B. By dissociating oxides of nitrogen
C. From coal gas (coke oven gas)
D. From producer gas
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Which of the following is not a measure component necessarily to be present in fertilisers ?
A. Nitrogen
B. Potassium
C. Phosphorous
D. Sulphur
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Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
A. Increased biuret formation
B. High corrosion rate
C. Increased cost of equipment
D. All a., b. & c.
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The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ____________ percent?
A. 60
B. 30
C. 95
D. 100
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Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?
A. Phosphoric acid
B. Superphosphate
C. Phosphorous
D. Triple superphosphate
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Lower temperature and large excess of ammonia in urea melt__________________?
A. Increases biuret formation
B. Decreases biuret formation
C. Is undesirable
D. Does not effect biuret formation
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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