Absorption of SO3 in 97% H2SO4 is_______________?

Related Mcqs:

1. In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by ?

   A. Increasing the oxygen concentration
   B. Putting more quantity of V2O5 catalyst in the converter
   C. Removing some quantity of SO3 during intermediate stage
   D. Maintaining low temperature & pressure in the converter

2. In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because___________________?

   A. SO3 gas is sparingly soluble in water
   B. Water forms an acid mist, which is difficult to absorb
   C. The purity of acid is affected
   D. Scale formation in the absorber is to be avoided

3. At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system) ?

   A. P
   B. √P
   C. P2
   D. 1/P

4. Oxidation of SO2 to SO3 is favoured by______________________?

   A. Low temperature and low pressure
   B. Low temperature and high pressure
   C. High temperature and low pressure
   D. High temperature and high pressure

5. Sulphuric acid saturated with SO3 is called_________________?

   A. Concentrated H2SO4
   B. Sulphurous acid
   C. Oleum
   D. None of these

6. Which is the most efficient absorbent for SO3 out of the following ?

   A. 20% oleum
   B. 65% oleum
   C. 78% H2SO4
   D. 98% H2SO4

7. Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?

   A. 80
   B. 90
   C. 98
   D. 100

8. In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst___________________?

   A. Gives higher conversion efficiency
   B. Has a longer life and is not poisoned by arsenic
   C. Handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant
   D. All A , B. and C.

9. H2S is scrubbed from refinery gases by absorption using ________________________?

   A. Dilute H2SO4
   B. Ethanol amine
   C. Chilled water
   D. Tri-butyl phosphate

10. During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to__________________?

    A. Increase the rate of absorption
    B. Avoid corrosion
    C. Reduce the cooling water circulation rate
    D. None of these