A. NH2.CO.NH2
B. NH3CO.CH3
C. NH.CO2.NH
D. NH3.CO2.NH3
Related Mcqs:
- Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________________?
A. Low bulk density product
B. Biuret formation
C. Non-spherical prills
D. Substantially wet non-flowing and sticky product - Urea is a better fertilizer than ammonium sulphate, because__________________?
A. It is cheaper
B. Nitrogen content is higher
C. It is not poisonous
D. It is easy to manufacture - 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. - Urea is formed only____________________?
A. In liquid phase
B. In vapour phase
C. At very high temperature
D. At very low pressure (vacuum) - Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________?
A. Nitric acid
B. Ammonia
C. Ammonium nitrate
D. Nitric oxide - Raw materials for urea production are _________________?
A. CO2 and N2
B. CO2, H2 and N2
C. NH3 and CO
D. HNO3 and CaCO3 - 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 - During conversion of ammonium carbamate into urea, presence of large excess of water______________?
A. Increases the yield of urea
B. Adversely affects the yield of urea
C. Reduces the evaporator load by diluting the urea solution
D. Does not affect the yield of urea - In the manufacture of urea, the intermediate chemical formed is__________________?
A. Biuret
B. Ammonium carbamate
C. Ammonium carbonate
D. None of these - Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction?
A. Exothermic
B. Endothermic
C. Autocatalytic
D. Catalytic
