Chemical Reaction Engineering A catalyst in a chemical reaction All of these Increases the frequency of collisions of reacting species Alters the reaction mechanism Decreases the activation energy All of these Increases the frequency of collisions of reacting species Alters the reaction mechanism Decreases the activation energy 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) Tan T/T Tan hT/T None of these Tan hT/tan T Tan T/T Tan hT/T None of these Tan hT/tan T ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the Increased temperature reduces the activation energy Collision frequency increases Fraction of molecules having threshold energy increases Value of threshold energy decreases Increased temperature reduces the activation energy Collision frequency increases Fraction of molecules having threshold energy increases Value of threshold energy decreases ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Non-catalytic fluid-solid reactions are represented by __________ model. Continuous reaction Neither A and B Unreacted core Both A and B Continuous reaction Neither A and B Unreacted core Both A and B ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In a semi-batch reactor Maximum conversion can be controlled Both the reactants flow counter-currently Velocity of reaction can be controlled Residence time is constant Maximum conversion can be controlled Both the reactants flow counter-currently Velocity of reaction can be controlled Residence time is constant ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Exothermic reactions are best carried out in CSTR followed by a plug flow reactor A CSTR A plug flow reactor followed by CSTR CSTR in series CSTR followed by a plug flow reactor A CSTR A plug flow reactor followed by CSTR CSTR in series ANSWER DOWNLOAD EXAMIANS APP
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