Chemical Reaction Engineering Batch process is preferred over continuous process, when the Sales demand of product is not steady Same equipment can not be used for several processes of the same nature All of these Product yields and quality can not be achieved in continuous process, because of long residence time Sales demand of product is not steady Same equipment can not be used for several processes of the same nature All of these Product yields and quality can not be achieved in continuous process, because of long residence time ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Signal normally used to study non-ideal flow by stimulus response technique is __________ input. Pulse Both A & B Neither A nor B Step Pulse Both A & B Neither A nor B Step ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is 8987°K 8621°K 9210°K 8764°K 8987°K 8621°K 9210°K 8764°K ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Pick the WRONG design guideline for a reactor in which the reactions, A → R (desired) and A → S (undesired) are to take place. The ratio of the reaction rates is rR/rS = (k₁/k₂).Csub>Aa-b Use high pressure and eliminate inerts, when a > b Avoid recycle, when a > b Use batch reactor or plug flow reactor, when a > b Use CSTR with a high conversion, when a > b Use high pressure and eliminate inerts, when a > b Avoid recycle, when a > b Use batch reactor or plug flow reactor, when a > b Use CSTR with a high conversion, when a > b 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." Inner catalyst core of radius R/2 does not participate in reaction Inner catalyst core of radius R/8 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/2 does not participate in reaction Inner catalyst core of radius R/8 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 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following factors control the deactivation of a porous catalyst pellet? Form of surface attack by poison Decay reactions All of these Pore diffusion Form of surface attack by poison Decay reactions All of these Pore diffusion ANSWER DOWNLOAD EXAMIANS APP
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