A. A mixture of K2CO3 and As2O3
B. K2SO4
C. A mixture of Na2CO3 and As2O3
D. Na2SO4
Related Mcqs:
- Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching ?
A. Isopropyl alcohol
B. Butyl alcohol
C. Toluene
D. Hexane - Catalytic ammonia synthesis reaction as in Haber’s process is_________________?
A. Endothermic
B. Exothermic
C. Irreversible
D. None of these - Temperature and pressure in ammonia converter is_________________?
A. 200 atm, 1000°C
B. 450 atm, 200°C
C. 450 atm, 550°C
D. 450 atm, 1000°C - 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 - Catalyst used in Haber’s process for ammonia production is_________________?
A. Reduced iron oxide
B. Nickel
C. Vanadium pentoxide
D. Silica gel - Chemical formula of biuret is_________________?
A. NH2.CO.NH2
B. NH3.COO.NH3
C. NH2CONHCONH2
D. NH4COONH2 - Raw materials for nitric acid manufacture are___________________?
A. Hydrogen peroxide, air and water
B. Anhydrous ammonia and air
C. Anhydrous ammonia, air and water
D. Wet ammonia, air and water - 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. - P2O5 content in superphosphate is about _____________ percent?
A. 30-35
B. 15-20
C. 65-70
D. 85-90 - Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________?
A. Nitric acid
B. Ammonia
C. Ammonium nitrate
D. Nitric oxide
