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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 6
36.
In a packed bed absorption column, the channelling will be noted by the
increase in flow rate.
sharp drop in pressure drop.
sharp rise in pressure drop.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm2/second.
1
1 to 5
5 to 10
> 10
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
In liquid-liquid extraction, the number of phases at plait point is
1
2
3
4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer.
The entire amount of C is transferred to solvent B.
Less than 2 kg but more than 1 kg of C is transferred to solvent B.
Less than 1 kg of C is transferred to B.
No amount of C is tranferred to B.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The surface renewal frequency in Danckwerts' model of mass transfer is given by (KL: mass transfer co-efficient)
KL2.DA
KL2.DA
KL2/DA
KL/DA2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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