Chemical Reaction Engineering The reason why a catalyst increases the rate of reaction is that, it Increases the activation energy Decreases the energy barrier for reaction Decreases the molecular collision diameter None of these Increases the activation energy Decreases the energy barrier for reaction Decreases the molecular collision diameter None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R? 2.5 1.6 2 2.24 2.5 1.6 2 2.24 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Variables affecting the rate of homogeneous reactions are Pressure and temperature only Pressure, temperature and composition Pressure and composition only Temperature and composition only Pressure and temperature only Pressure, temperature and composition Pressure and composition only Temperature and composition only ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A catalyst loses its activity due to Agglomeration of metal particles caused by thermal sintering of the solid surface Covering of the catalytic active sites by a foregin substance All of these Loss in surface area of the active component Agglomeration of metal particles caused by thermal sintering of the solid surface Covering of the catalytic active sites by a foregin substance All of these Loss in surface area of the active component ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single CSTR of volume V/X PFR of volume V/X PFR of volume V CSTR of volume V CSTR of volume V/X PFR of volume V/X PFR of volume V CSTR of volume V ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering When a catalyst increases the rate of forward reaction, the value of rate constant Decreases Remain same Becomes infinite Increases Decreases Remain same Becomes infinite Increases ANSWER DOWNLOAD EXAMIANS APP
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