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.Management Sciences
Category: Fertilizer Technology
Effectiveness of a fertiliser is independent of the ___________________?
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A. Nature of soil
B. Type of crop
C. pH of soil
D. None of these
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
Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is___________________?
A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these
Which of the following fertilisers contains the least percentage of nitrogen ?
A. Liquid ammonia
B. Urea
C. Ammonium phosphate
D. Ammonium sulphate
Vetrocoke solution is_________________?
A. A mixture of K2CO3 and As2O3
B. K2SO4
C. A mixture of Na2CO3 and As2O3
D. Na2SO4
Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it___________________?
A. Has a pungent smell
B. Vaporises at normal temperature
C. Is toxic and highly corrosive
D. Is in short supply
Catalytic ammonia synthesis reaction as in Haber’s process is_________________?
A. Endothermic
B. Exothermic
C. Irreversible
D. None of these
Both white phosphorous as well as red phosphorous_________________?
A. Are soluble in CS2
B. Burns when heated in air
C. Reacts with hot caustic soda solution to give Phosphine
D. All A., B., and C.
pH value of soil is maintained at ______________ by the addition of fertiliser for optimum growth and health of the plant?
A. 4-5
B. 7-8
C. 9-10
D. 12-13
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