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 None of these Reaction External mass transfer Diffusion within the pellet None of these Reaction External mass transfer Diffusion within the pellet 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 Neither A nor B Both A & B Pressure Temperature Neither A nor B Both A & B Pressure Temperature ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction? 3 2 Zero 1 3 2 Zero 1 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The catalytic converter for conversion of SO₂ to SO₃ by contact process should have a feed with SO₂ content between 7-10% 2-5% 12-15% 20-25% 7-10% 2-5% 12-15% 20-25% ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In a semi-batch reactor Both the reactants flow counter-currently Velocity of reaction can be controlled Maximum conversion can be controlled Residence time is constant Both the reactants flow counter-currently Velocity of reaction can be controlled Maximum conversion can be controlled Residence time is constant ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst. Unpredictable from the data Decreases Increases Remains unaffected Unpredictable from the data Decreases Increases Remains unaffected ANSWER DOWNLOAD EXAMIANS APP
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