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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. Molecular diffusivity of a liquid

View solution

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.

View solution

Q. Henry's law states that the

View solution

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

View solution

Q. Tower diameter may be decreased by

View solution

Q. Rayleigh's equation applies to __________ distillation.

View solution

Q. Steady state equimolal counter diffusion is encountered in

View solution

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

View solution

Q. Removal of __________ exemplifies an adsorption unit operation.

View solution

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

View solution

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.

View solution

Q. For gas absorption, low viscosity solvents are preferred, because of their

View solution