P2O5 content in superphosphate is about _____________ percent?
A. 30-35
B. 15-20
C. 65-70
D. 85-90
Fertilizer Technology
Promoter used in NH3 synthesis catalyst is__________________?
Promoter used in NH3 synthesis catalyst is__________________?
A. K2O
B. SiO3
C. V2O5
D. U2O3
Maximum stability of white phosphorous is at__________________?
Maximum stability of white phosphorous is at__________________?
A. Very high pressure
B. Atmospheric pressure
C. Room temperature
D. > 600°C
Potassic fertilisers__________________?
Potassic fertilisers__________________?
A. Are useful during early stage of the plant growth
B. Stimulate early growth and accelerate seeding
C. Help in development of starches of potatoes and grain
D. None of these
Which is the most suitable fertiliser for paddy ?
Which is the most suitable fertiliser for paddy ?
A. CAN
B. Ammonium sulphate
C. Ammonium nitrate
D. Superphosphate
Catalyst used in ammonia synthesis uses ____________ as a promoter?
Catalyst used in ammonia synthesis uses ____________ as a promoter?
A. Pt
B. K2O
C. Al2O3
D. Ni
A fertiliser plant is classified as a gas based fertiliser plant, when it uses ______________ gas as a source of hydrogen for the manufacture of ammonia?
A fertiliser plant is classified as a gas based fertiliser plant, when it uses ______________ gas as a source of hydrogen for the manufacture of ammonia?
A. Coke oven
B. Producer
C. Natural
D. Coal
Nitrogenous fertiliser is required__________________?
Nitrogenous fertiliser is required__________________?
A. During the early stage of growth to promote development of stem and leaves
B. For accelerating fruit formation in later stage of growth
C. To lessen the effect of excessive potash application
D. None of these
Ammonia synthesis reaction is______________________?
Ammonia synthesis reaction is______________________?
A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these
During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about ______________ percent?
During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about ______________ percent?
A. 38
B. 68
C. 82
D. 98