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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 7
21.
Separation of __________ employs gaseous diffusion process.
N2 and O2 from air
isotopes of uranium
isotopes of helium
SO2 and air
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
For water-ethanol system, the minimum reflux ratio
is computed from the slope of the upper operating line that is tangent to the equilibrium curve.
is computed from the intercept of the operating line.
cannot be computed.
is the optimum reflux ratio.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3)
500
1200
900
800
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.
lower than
higher than
same as
either same or higher than
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Experimental determination of __________ is done by wetted wall column method.
diffusion co-efficient
mass transfer co-efficient
NTU
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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