A. Decreases
B. Increases
C. Remains unchanged
D. May increase or decrease, depends on the system
Related Mcqs:
- Components, having widely different boiling point in a binary mixture, can be separated using ________________ distillation?
A. Molecular
B. Extractive
C. Steam
D. Simple - 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___________________?
A. The system comprises of partially miscible liquids
B. The system comprises of miscible liquids
C. The system comprises of an azeotrope
D. On heating, a vapor phase will appear; while on cooling, a solid phase will appear - With increase in pressure, the relative volatility for a binary system__________________?
A. Increases
B. Decreases
C. Remains same
D. Either A. or B., depends on the system - With increase in pressure, the relative volatility for a binary system_________________?
A. Increases
B. Decreases
C. Remains same
D. Either A. or B., depends on the system - Which of the following binary systems is an example of a maximum boiling azeotrope ?
A. Water-hydrochloric acid
B. Acetone-carbon disulphide
C. Water-ethyl alcohol
D. n-heptane-n-octane - For a binary mixture with low relative volatility, continuous rectification to get pure products will require_____________________?
A. Low reflux ratio
B. Less number of trays
C. Small cross-section column
D. High reflux ratio - The relative volatility of a binary mixture at constant temperature _________________ the total pressure?
A. Decreases with increase in
B. Increases with increase in
C. Is independent of
D. None of these - According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column ?
A. 5
B. 9
C. 12
D. 28 - Bound moisture is that liquid which exerts an equilibrium vapor pressure ________________ that of the pure liquid at the given temperature ?
A. Less than
B. More than
C. Equal to
D. Either A. or B.; depends on the solid - In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of_______________________?
A. Area between operating line and 45° diagonal x-y diagram
B. Condenser and reboiler surfaces
C. Tower cross-section
D. None of these
