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.Management Sciences
Category: Fertilizer Technology
Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
A. Nitrogen
B. Phosphorous
C. Potassium
D. Calcium
Phosphatic fertilisers_________________?
A. Are useful during early stage of the plant growth
B. Accelerate fruit formation in later stages of growth
C. Lessen the effect of excessive nitrogen application
D. None of these
Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber’s process ?
A. High pressure, low reactants concentration, high temperature
B. High pressure, low reactants concentration, low temperature
C. High pressure, high reactants concentration, low temperature
D. Low pressure, high reactants concentration, low temperature
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________________?
A. Low bulk density product
B. Biuret formation
C. Non-spherical prills
D. Substantially wet non-flowing and sticky product
Reaction of calcium Fluorapatite with sulphuric acid produces ___________________?
A. Ortho-phosphoric acid
B. Simple superphosphate
C. Triple superphosphate
D. Red phosphorous
Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________?
A. Nitric acid
B. Ammonia
C. Ammonium nitrate
D. Nitric oxide
P2O5 percentage in the phosphoric acid produced by wet process is about_________________?
A. 10
B. 30
C. 50
D. 70
Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________?
A. Comparatively higher pressure drop
B. High cost of the high pressure vessel used for the reactor
C. Higher pumping cost
D. Chances of entrainment and disturbance of catalyst bed
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