Prilling tower is found in the flowsheet for the manufacture of__________________?

Related Mcqs:

1. 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

2. 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

3. An increase in the NH3/CO2 ratio in urea manufacture results in__________________?

   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

4. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?

   A. Phosphoric acid
   B. Superphosphate
   C. Phosphorous
   D. Triple superphosphate

5. Montecatini process is used for the manufacture of____________________?

   A. Nitric acid
   B. Phosphoric acid
   C. Urea
   D. Calcium ammonium nitrate (CAN)

6. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?

   A. Stabilisation
   B. Increasing the effectiveness
   C. Improving the strength & heat resistance
   D. All A, B & C

7. 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

8. Electric process as compared to wet process (for the manufacture of phosphoric acid) ?

   A. Can use only high grade phosphate rock
   B. Is used less frequently
   C. Produces a valuable by-product called gypsum
   D. Is weak acid process

9. Montecatini process is a widely used process for the manufacture of ___________________?

   A. Urea
   B. Calcium ammonium nitrate
   C. Triple superphosphate
   D. None of these

10. _____________ is the undesirable by-product produced in the manufacture of urea ?

    A. Ammonium carbonate
    B. Biuret
    C. Carbon dioxide
    D. Ammonium carbamate