Chemical Reaction Engineering Catalyst is a substance, which __________ chemical reaction. Decreases the speed of a Increases the speed of a Can either increase or decrease the speed of a Alters the value of equilibrium constant in a reversible Decreases the speed of a Increases the speed of a Can either increase or decrease the speed of a Alters the value of equilibrium constant in a reversible ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A stirred tank reactor compared to tubular-flow reactor provides Higher overall selectivity for a first order consecutive reaction All of these More uniform operating conditions Permits operation at the optimum temperature for a long reaction time Higher overall selectivity for a first order consecutive reaction All of these More uniform operating conditions Permits operation at the optimum temperature for a long reaction time ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Arhenious equation shows the variation of __________ with temperature. Rate constant Energy of activation Reaction rate Frequency factor Rate constant Energy of activation Reaction rate Frequency factor ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following is the most suitable for isothermal operation? Fixed bed reactor Plug-flow reactor Back-mix reactor Batch reactor Fixed bed reactor Plug-flow reactor Back-mix reactor Batch reactor ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering "A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction." Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1 Inner catalyst core of radius R/8 does not participate in reaction Inner catalyst core of radius R/2 does not participate in reaction Inner catalyst core of radius 7R/8 does not participate in reaction Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1 Inner catalyst core of radius R/8 does not participate in reaction Inner catalyst core of radius R/2 does not participate in reaction Inner catalyst core of radius 7R/8 does not participate in reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is One Two Zero Three One Two Zero Three ANSWER DOWNLOAD EXAMIANS APP
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