Mass Transfer In case of absorption with exothermic reaction, for fluids having Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same Pr = Sc ; there won Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change in the degree of turbulence Both A & B Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same Pr = Sc ; there won Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change in the degree of turbulence Both A & B ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following is not fixed by the process requirements, in the design of absorbers? None of these Flow rate of the entering gas Composition of the entering liquid Terminal concentrations of gas stream None of these Flow rate of the entering gas Composition of the entering liquid Terminal concentrations of gas stream ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer 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 Differential heat of adsorption Heat of wetting Integral heat of adsorption None of these Differential heat of adsorption Heat of wetting Integral heat of adsorption None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Entrainer used in azeotropic distillation should Have high latent heat of vaporisation Form a new azeotrope of low relative volatility with one of the constituents of the mixture Form a low boiling azeotrope with one of the constituents of the mixture Have high viscosity to provide high tray efficiency Have high latent heat of vaporisation Form a new azeotrope of low relative volatility with one of the constituents of the mixture Form a low boiling azeotrope with one of the constituents of the mixture Have high viscosity to provide high tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect The product composition as well as the fraction vaporised The product composition but not the fraction vaporised The fraction vaporised but not the product composition Neither the product composition nor the fraction vaporised The product composition as well as the fraction vaporised The product composition but not the fraction vaporised The fraction vaporised but not the product composition Neither the product composition nor the fraction vaporised ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Tower diameter may be decreased by Using higher reflux ratio Increasing the liquid flow rate Increasing the vapour flow rate Use of increased tray spacing Using higher reflux ratio Increasing the liquid flow rate Increasing the vapour flow rate Use of increased tray spacing ANSWER DOWNLOAD EXAMIANS APP
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