A. Increases
B. Decreases
C. Decreases linearly
D. Remain unaffected
Related Mcqs:
- Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be_________________?
A. 1
B. > 1
C. < 1
D. ≤ 1 - To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate) ____________________?
A. Increase both ‘G’ and ‘S’
B. Decrease both ‘G’ and ‘S’
C. Increase ‘S’ and decrease ‘G’
D. Increase ‘G’ and decrease ‘S’ - In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer?
A. The entire amount of C is transferred to solvent B
B. Less than 2 kg but more than 1 kg of C is transferred to solvent B
C. Less than 1 kg of C is transferred to B
D. No amount of C is transferred to B - Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the solvent flow, rate is 400 moles of S/m2. hr. The equilibrium data is represented by Y = 3X2 , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is_________________________?
A. 25%
B. 50%
C. 70%
D. 90% - The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?
A. Liquid side
B. Gas side
C. Interfacial
D. Both liquid and gas side - The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?
A. Liquid side
B. Gas side
C. Interfacial
D. Both liquid and gas side - With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?
A. Decreases
B. Remains unchanged
C. Increases
D. Decreases exponentially - For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
A. G/(FG . a)
B. FG/(G . a)
C. (G . a)/FG
D. L/(FG . G) - An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is ?
A. 9.21
B. 4.605
C. 100
D. 0.001 - Selectivity of the solvent used in solvent extraction should be)_________________?
A. 1
B. > 1
C. < 1
D. 0
