Q. Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)

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Q. In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

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Q. In triangular co-ordinates, the ternery composition point falls __________ of the triangle.

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Q. As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

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Q. Pick out the system with maximum boiling azeotrope at 1 atm.

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Q. Rate of adsorption increases as the

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Q. Chemisorption compared to physical absorption has

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Q. Desulphurisation of petrol is done in a

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Q. Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

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Q. The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

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Q. The boiling points of pure components of a binary system __________ with increase in total pressure of the system.

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Q. A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

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Q. For absorbing a sparingly soluble gas in a liquid, the

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Q. Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be

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Q. Which of the following is used for the concentration of rubber latex ?

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Q. Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.

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Q. At 750°K and 1 atm, the approximate value of Schmidt number for air is

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Q. In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

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Q. Fractional solvent extraction

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Q. __________ is concerned with the adsorption equilibria.

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