A. 200 atm, 1000°C
B. 450 atm, 200°C
C. 450 atm, 550°C
D. 450 atm, 1000°C
Related Mcqs:
- In _____________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed?
A. Fauser-Montecatini
B. Claude
C. Uhde
D. Kellogg - Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
A. Increased biuret formation
B. High corrosion rate
C. Increased cost of equipment
D. All A., B. & C. - Catalytic ammonia synthesis reaction as in Haber’s process is_________________?
A. Endothermic
B. Exothermic
C. Irreversible
D. None of these - Catalyst used in Haber’s process for ammonia production is_________________?
A. Reduced iron oxide
B. Nickel
C. Vanadium pentoxide
D. Silica gel - Temperature and pressure in urea autoclave is_________________?
A. 120°C and 300 atm
B. 190°C and 200 atm
C. 400°C and 550 atm
D. 200°C and 10 atm - Lower temperature and large excess of ammonia in urea melt__________________?
A. Increases biuret formation
B. Decreases biuret formation
C. Is undesirable
D. Does not effect biuret formation - 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 - Iron is not used alone as a catalyst in ammonia synthesis, because___________________?
A. Its activity declines rapidly, if heated to above 520°C
B. It decomposes ammonia
C. It gets oxidised above 500°C
D. None of these - Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the _______________ process?
A. Haber’s
B. Stengel
C. Le-chatelier’s
D. Du-pont’s - 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
