Chemical Reaction Engineering Semibatch reactor is preferred, when a/an All of these Undersirable side reaction (at high concentration of one of the reactants) is to be avoided A highly exothermic reaction is to be controlled A gas is to be reacted with liquid (e.g. hydrogenation of fat) All of these Undersirable side reaction (at high concentration of one of the reactants) is to be avoided A highly exothermic reaction is to be controlled A gas is to be reacted with liquid (e.g. hydrogenation of fat) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to 1 0.1 0.5 1 0.1 0.5 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In case of staged packed bed reactors carrying out exothermic reaction, use Plug flow for dilute liquid requiring no large preheating of feed All of these Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature High recycle for pure gas Plug flow for dilute liquid requiring no large preheating of feed All of these Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature High recycle for pure gas ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is Plug flow reactor PFR in series Backmix reactor Series of CSTR Plug flow reactor PFR in series Backmix reactor Series of CSTR 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? 1.6 2.5 2.24 2 1.6 2.5 2.24 2 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The 'E' curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt In the reactor Averaged over the inlet and outlet At the inlet At the outlet In the reactor Averaged over the inlet and outlet At the inlet At the outlet ANSWER DOWNLOAD EXAMIANS APP
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