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.Management Sciences
Category: Common Chemical Industries
Which one of the following is an inorganic fertilizer ?
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A. manure
B. urea
C. ammonium nitrate
D. All
Which of the following is incorrect statement about nitrogen importance ?
A. It enhances plant growth
B. It is involved in the synthesis of protein and nucleic acids
C. it accelerates fruits and flowers growth
D. It is involved in the chlorophyll synthesis
The cooling of molten urea by air in the tower is called______________________?
A. prilling
B. evaporation
C. condensation
D. crystallization
Which of the following is the most suitable catalyst for ammonia synthesis ?
A. Pt
B. ZnO + Cr2O3
C. Fe in fused mixture of Al2O3 + SiQ2 + MgO
D. All of the above
Which one of the following fertilizers provides the nitrogen and phosphorus to the plant ?
A. urea
B. calcium superphosphate
C. diammonium phosphate
D. potassium nitrate
Which of the following potassium fertilizers are more useful for horticultural crops tobacco & potatoes ?
A. KCI
B. KNO3
C. K2SO4
D. KMnO4
Cement is a mixture of________________?
A. clay and clinker
B. clay lime stone and gypsum
C. lime stone and gypsum
D. lime stone and clay
DAP (Diammonium hydrogen phosphate) contains ______________ plant nutrients?
A. 60%
B. 65%
C. 70%
D. 75%
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