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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 4
31.
The Kundsen diffusivity is proportional to (where, T = absolute temperature)
T
T2
T
T4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
In case of constant underflow extraction operation, the __________ at all solute concentration.
solids are drained to the same extent
ratio of the insoluble to solution is constant
both(a) & (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
greater than
smaller than
equal to
either (a), or (b) ; depends on the type of packing
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)
Kc = Kp = Km
Kc = Kp/RT = Km . RT/P
Kc = Kp . RT = Km . RT/p
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
With increase in temperature, the leaching rate increases because of the
increased diffusivity.
decreased viscosity of liquid.
both (a) and (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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