Chemical Engineering — Test 168
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Question 1
Urea is a better fertilizer than ammonium sulphate, because__________________?
Question 2
Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
Question 3
An increase in the NH3/CO2 ratio in urea manufacture results in__________________?
Question 4
Maximum nitrogen percentage is in________________?
Question 5
Fertiliser plants get their N2 requirements _____________________?
Question 6
Which of the following is not a measure component necessarily to be present in fertilisers ?
Question 7
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
Question 8
The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ____________ percent?
Question 9
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?
Question 10
Lower temperature and large excess of ammonia in urea melt__________________?