Chemical Reaction Engineering The importance of diffusion in a catalyst are increased by Large catalyst particle size An active surface of the catalyst Small pore diameter All of these Large catalyst particle size An active surface of the catalyst Small pore diameter All of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Batch process is preferred over continuous process, when the Product yields and quality can not be achieved in continuous process, because of long residence time Sales demand of product is not steady All of these Same equipment can not be used for several processes of the same nature Product yields and quality can not be achieved in continuous process, because of long residence time Sales demand of product is not steady All of these Same equipment can not be used for several processes of the same nature ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m³ of each A and B enters the reactor at 8m³ /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed?(Data: Heat of reaction = - 50 kJ/mole, Density of the reacting mixture = 1000kg/m³, Specific heat of reacting mixture = 2kJ/kg.K)The above data can be assumed to be independent of temperature and composition. 390 290 490 190 390 290 490 190 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ? Data insufficient, can Either of the arrangement A or B will give the same yield Large reactor followed by smaller one Smaller reactor followed by larger one Data insufficient, can Either of the arrangement A or B will give the same yield Large reactor followed by smaller one Smaller reactor followed by larger one 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 hT/tan T None of these Tan hT/T Tan T/T Tan hT/tan T None of these Tan hT/T Tan T/T ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A catalyst in a chemical reaction Decreases the activation energy Increases the frequency of collisions of reacting species Alters the reaction mechanism All of these Decreases the activation energy Increases the frequency of collisions of reacting species Alters the reaction mechanism All of these ANSWER DOWNLOAD EXAMIANS APP
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