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
Fertilizer Technology
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
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.
Which of the following is not a measure component necessarily to be present in fertilisers ?
Which of the following is not a measure component necessarily to be present in fertilisers ?
A. Nitrogen
B. Potassium
C. Phosphorous
D. Sulphur
Fertiliser plants get their N2 requirements _____________________?
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
Maximum nitrogen percentage is in________________?
Maximum nitrogen percentage is in________________?
A. Ammonium sulphate
B. Calcium ammonium nitrate
C. Urea
D. Liquid ammonia
An increase in the NH3/CO2 ratio in urea manufacture results in__________________?
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
Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
A. Phosphoric acid
B. Coke
C. Sulphuric acid
D. Silica and coke
Urea is a better fertilizer than ammonium sulphate, because__________________?
Urea is a better fertilizer than ammonium sulphate, because__________________?
A. It is cheaper
B. Nitrogen content is higher
C. It is not poisonous
D. It is easy to manufacture
Conditioners like finely divided peat are added to the fertiliser to________________?
Conditioners like finely divided peat are added to the fertiliser to________________?
A. Counteract burning
B. Avoid caking & hardening
C. Produce bulk
D. Increase its solubility
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas ?
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas ?
A. Water
B. Naphtha
C. Tar
D. Coal/coke oven gas