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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 5
41.
Which of the following same diameter columns gives lowest pressure drop per unit height ?
Bubble-cap column
Sieve-plate column
Packed column (stacked)
Randomly packed column
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.
degree of ideality
viscosity
both 'a '& 'b'
neither 'a' nor 'b'
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Stage efficiency in a leaching process depends on the
time of contact between the solid and the solution
rate of diffusion of the solute through the solid and into the liquid
both (a) and (b)
vapour pressure of the solution
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Operating velocity in a packed tower is usually __________ the flooding velocity.
half
twice
equal to
more than
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The Knudsen diffusivity is dependent on the
molecular velocity only.
pore radius of the catalyst only.
molecular mean free path only.
molecular velocity and por radius of the catalyst.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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