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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 13
41.
For a distillation column operating at minimum reflux, the
concentration of liquid and vapour leaving a plate will be same.
reflux ratio will be maximum.
number of plates required will be maximum.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))
M(Xo - XF)
M(Xo/XF)
M ln(Xo/XF)
MXo ln(Xo/XF)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Flash distillation is suitable for the separation of components
having very close boiling points.
which form maximum boiling azeotrope.
having very wide boiling points.
which form minimum boiling azeotrope.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
In Mcabe-Thiele method, at infinite reflux ratio
number of plates is maximum.
overhead product is maximum.
both the operating lines coincide with the diagram.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Leaching rate is independent of the
agitation
temperature
particle size
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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