Chemical Reaction Engineering A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by Reaction External mass transfer None of these Diffusion within the pellet Reaction External mass transfer None of these Diffusion within the pellet ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions. First Any Third Second First Any Third Second ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Higher free energy of activation of a chemical reaction (at a given temperature) implies Higher rate of reaction Slower rate of reaction Higher equilibrium conversion Both B and C Higher rate of reaction Slower rate of reaction Higher equilibrium conversion Both B and C ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance. Either A, B or C Chemical reaction Diffusion through ash layer Film diffusion Either A, B or C Chemical reaction Diffusion through ash layer Film diffusion ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R? 2.5 1.6 2.24 2 2.5 1.6 2.24 2 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffacted by pressure changes ? 2SO? + O? ? 2SO? 2NO? ? N?O? N? + O? ? 2NO 2O? ? 3O? 2SO? + O? ? 2SO? 2NO? ? N?O? N? + O? ? 2NO 2O? ? 3O? ANSWER DOWNLOAD EXAMIANS APP
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