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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 9
16.
Ammonia present in the coke oven gas is removed by washing with
caustic solution
dilute ammoniacal liquor
dilute HCl
ethanolamine
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
With increase in temperature, the leaching rate increases due to
decreased liquid viscosity
increased diffusivity
both (a) and (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Which of the following processes is not an example of adsorption applied to gaseous separations ?
Recovery of valuable solvent vapors from dilute mixture with air and other gases.
Dehumidification of air and gas.
Removal of objectionable odour and impurities from industrial gases.
Decolouration of yellow glycerene.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The critical moisture content in case of drying indicates the __________ rate period.
beginning of falling
beginning of constant
end of falling
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Pick out the wrong statement
A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity.
When water is cooled from 80 to 70°C by exposure to the air with a wet bulb temperature of 60°C, then both the approach & the range would be 10°C.
For unsaturated air-water vapor mixture at atmospheric conditions, the wet bulb temperature & adiabatic cooling lines are the same.
Relative saturation of unsaturated mixture of water vapor & air can not be increased by either reducing the mixture temperature or by increasing the total pressure.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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