A. P
B. P2
C. P3
D. P4
Related Mcqs:
- Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________?
A. Presence of an inert atmosphere
B. Presence of a reducing atmosphere
C. Absence of air
D. Presence of an oxidising atmosphere - Montecatini process is a widely used process for the manufacture of ___________________?
A. Urea
B. Calcium ammonium nitrate
C. Triple superphosphate
D. None of these - Effectiveness of a fertiliser is independent of the ___________________?
A. Nature of soil
B. Type of crop
C. pH of soil
D. None of these - CaH4(PO4)2 is the chemical formula of ___________________?
A. Superphosphate
B. Triple superphosphate
C. Calcium phosphate
D. Meta phosphoric acid - Reaction of calcium Fluorapatite with sulphuric acid produces ___________________?
A. Ortho-phosphoric acid
B. Simple superphosphate
C. Triple superphosphate
D. Red phosphorous - Chemical formula of meta-phosphoric acid is ___________________?
A. H3PO4
B. H4P2O7
C. HPO3
D. Same as that of Pyrophosphoric acid - Catalyst used in steam reforming of naphtha is ___________________?
A. Bauxite
B. Cobalt
C. Nickel oxide on alumina support
D. Chromium - 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 - Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature___________________?
A. Rate of reaction is very low
B. Very high pressure is required resulting in costly pressure vessel
C. Space velocity of gas is very low resulting in decreased conversion
D. None of these - Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition _______________?
A. Electrolysis of water
B. Cryogenic removal of H2 from coke oven gas
C. Steam reforming of naphtha
D. Natural gas cracking
