Q. Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

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Q. Equilibrium-moisture curves of different solids

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Q. Azeotropism for ethyl alcohol-water system disappears by

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Q. Degree of freedom for leaching and solvent extraction process is

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Q. Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

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Q. Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?

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Q. Which of the following is a suitable absorbent for removal of H₂S from natural gas ?

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Q. Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

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Q. Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

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Q. Molecular diffusion is caused by the

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Q. At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

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Q. Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

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Q. Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.

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Q. Which of the following equipments is not used in liquid-liquid extraction ?

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Q. Pick out the wrong statement.

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Q. Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

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Q. Pick out the wrong statement.

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Q. At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?

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Q. Batch tray dryers suffers from the disadvantage of

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Q. In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

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