Q. 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 (αᴀʙ = 2) does not change appreciably in the coloumn.

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Q. Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

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Q. With increase in temperature, the mutual solubility of two liquids

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Q. Pick out the wrong statement.

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Q. The relative volatility of a binary mixture at the azeotropic composition is

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Q. Relative volatility varies with the concentration of component for an ideal solution. The relative volatity of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when

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Q. Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

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Q. Lewis number (Le) is

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Q. Pick out the wrong statement:

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Q. In liquid extraction, if the selectivity is unity, then

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Q. Paper industry employs __________ driers.

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Q. Which of the following has the same dimension as mass diffusivity ?

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Q. Pick out the wrong statement pertaining to the cooling towers.

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Q. Perforated plate towers are unique for solvent extraction because, they provide

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Q. In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero.

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Q. Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.

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Q. The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

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Q. The individual mass transfer co-efficients (moles/m² . s) 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 ?

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Q. Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ coloumn.

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Q. With the lowering of equiliDrium pressure, at a given temperature, the amount of ad-sorbate on the adsorbent

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