7061. In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)
Decreases
Increases
Remains unchanged
None of these
✅ The correct answer is option A.
Chemical Engineering
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7062. Absorption accompanied by heat evolution results in
Increased capacity of the absorber
Increase in equilibrium solubility
Decrease in equilibrium solubility
None of these
✅ The correct answer is option C.
7063. The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases ‘A’ and ‘B’ is
1
∞
0.5
2
✅ The correct answer is option B.
7065. If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that
The system comprises of partially mis-cible liquids
The system comprises of miscible liquids
The system comprises of an azeotrope
On heating, a vapor phase will appear ; while on cooling, a solid phase will appear
✅ The correct answer is option D.
7066. Design calculation for multiple component distillation is done by
Ponchon-Savarit method
Mccabe-Thiele method
Enthalpy concentration method
Tray to tray calculations
✅ The correct answer is option D.
7067. Which of the following is an undesirable characteristic for the solvent used in gas absorption?
Low vapor pressure
Low viscosity
High gas solubility
None of these
✅ The correct answer is option D.
7068. Freundlich equation applies to the adsorption of solute from
Dilute solutions, over a small concentration range
Gaseous solutions at high pressure
Concentrated solutions
None of these
✅ The correct answer is option A.
7069. The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)
L/mG
G/mL
ML/G
LG/m
✅ The correct answer is option A.
7070. Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in
Decreased solute solubility
Large minimum liquid to gas (L/G) ratio
Large number of trays
All of the above
✅ The correct answer is option D.