Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?

Related Mcqs:

1. 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

2. Catalyst used in ammonia synthesis uses ____________ as a promoter?

   A. Pt
   B. K2O
   C. Al2O3
   D. Ni

3. Promoter used in NH3 synthesis catalyst is__________________?

   A. K2O
   B. SiO3
   C. V2O5
   D. U2O3

4. Catalytic ammonia synthesis reaction as in Haber’s process is_________________?

   A. Endothermic
   B. Exothermic
   C. Irreversible
   D. None of these

5. 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

6. 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

7. 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

8. In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?

   A. Low pressure
   B. High pressure
   C. Very high temperature
   D. Atmospheric pressure; as the pressure has no effect on conversion

9. Ammonia synthesis reaction is______________________?

   A. Exothermic
   B. Endothermic
   C. Autocatalytic
   D. None of these

10. 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