Fertilizer Technology — Test 2
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Question 1
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
Question 2
The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ____________ percent?
Question 3
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?
Question 4
Lower temperature and large excess of ammonia in urea melt__________________?
Question 5
Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil?
Question 6
Montecatini process is used for the manufacture of____________________?
Question 7
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium___________________?
Question 8
Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis ?
Question 9
Urea is formed only____________________?
Question 10
A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?