Q. Sodium bicarbonate is produced during soda ash manufacture using a __________ tower.

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Q. Powdery materials can be guarded against caking tendency on storage by

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Q. According to Poiseuille's law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)

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Q. For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be

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Q. H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

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Q. Packed column distillation is limited to the column __________ metres.

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Q. For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law.

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Q. The operating cost of a distillation column at minimum reflux ratio is

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Q. The reflux to a distillation column is 100 moles/hr, when the overhead product rate is 50 moles/hr. The reflux ratio is

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Q. Molecular diffusivity of a liquid

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Q. The wet and dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

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Q. Henry's law states that the

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Q. The relative volatility of a binary mixture at constant temperature __________ the total pressure.

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Q. Tower diameter may be decreased by

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Q. Rayleigh's equation applies to __________ distillation.

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Q. Steady state equimolal counter diffusion is encountered in

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Q. Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele's method ?

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Q. Removal of __________ exemplifies an adsorption unit operation.

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Q. Can the efficiency of a plate in the distillation tower be greater than 100% ?

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Q. With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

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