Chemical Reaction Engineering Holding time for flow reactors is __________ the space time, for constant fluid density Double None of these Triple Equal to Double None of these Triple Equal to ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the Both A & B Neither A nor B Temperature Pressure Both A & B Neither A nor B Temperature Pressure ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus) None of these Tan hT/tan T Tan hT/T Tan T/T None of these Tan hT/tan T Tan hT/T Tan T/T ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure? Adsorption isobar Freundlich adsorption isotherm Langmuir adsorption isotherm None of these Adsorption isobar Freundlich adsorption isotherm Langmuir adsorption isotherm None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature. May be greater or less than Is always equal to Is always less than Is always greater than May be greater or less than Is always equal to Is always less than Is always greater than ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length First increases and then decreases Decreases Is at the highest allowable temperature throughout Increases First increases and then decreases Decreases Is at the highest allowable temperature throughout Increases ANSWER DOWNLOAD EXAMIANS APP
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