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
Related Mcqs:
- 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 - Absorption of SO3 in 97% H2SO4 is_______________?
A. Exothermic
B. Endothermic
C. Not possible
D. None of these - Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?
A. Nitric acid
B. Sulphuric acid
C. Ammonium sulphate
D. Hydrochloric acid - 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 - 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 - Sulphuric acid saturated with SO3 is called_________________?
A. Concentrated H2SO4
B. Sulphurous acid
C. Oleum
D. None of these - Which is the most efficient absorbent for SO3 out of the following ?
A. 20% oleum
B. 65% oleum
C. 78% H2SO4
D. 98% H2SO4 - Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?
A. 80
B. 90
C. 98
D. 100 - 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. - Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________?
A. High cost
B. Fragile nature
C. Easy poisoning tendency
D. All A, B. and C.
