A. Increased degree of conversion of CO2 to urea
B. Decreased degree of conversion of NH3 to urea
C. Decreased yield of urea
D. Decreased specific volume of molten mass
Related Mcqs:
- ____________ catalyst is used in the production of urea from CO2 and NH3?
A. Vanadium pentoxide
B. No
C. Alumina
D. Nickel - 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 - Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an ______________ reaction?
A. Catalytic
B. Exothermic
C. Endothermic
D. Reversible - 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 - Catalyst used in the manufacture of NH3 by Haber’s process is finely divided________________?
A. Nickel
B. Iron
C. Vanadium pentoxide
D. Alumina - _____________ is the undesirable by-product produced in the manufacture of urea ?
A. Ammonium carbonate
B. Biuret
C. Carbon dioxide
D. Ammonium carbamate - In the manufacture of urea, the intermediate chemical formed is__________________?
A. Biuret
B. Ammonium carbamate
C. Ammonium carbonate
D. None of these - 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 - Promoter used in NH3 synthesis catalyst is__________________?
A. K2O
B. SiO3
C. V2O5
D. U2O3 - Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction?
A. Exothermic
B. Endothermic
C. Autocatalytic
D. Catalytic
