Chemical Reaction Engineering A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction. Equal to More than Less than Equal to or more than Equal to More than Less than Equal to or more than ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion. Film None of these Ash layer Pore Film None of these Ash layer Pore ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A space time of 3 hours for a flow reactor means that It takes three hours to dump the entire volume of the reactor with feed The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours Conversion is cent per cent after three hours Three reactor volumes of feed can be processed every hour It takes three hours to dump the entire volume of the reactor with feed The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours Conversion is cent per cent after three hours Three reactor volumes of feed can be processed every hour ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds. Series Parallel Auto catalytic Catalytic Series Parallel Auto catalytic Catalytic ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The units of frequency factor in Arhenious equation Are cycles per unit time Are the same as those of the rate constant Depend on the order of the reaction Depend on temperature, pressure etc. of the reaction Are cycles per unit time Are the same as those of the rate constant Depend on the order of the reaction Depend on temperature, pressure etc. of the reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) E + ΔHA - ΔHR E E + ΔHA ΔHA + ΔHR E + ΔHA - ΔHR E E + ΔHA ΔHA + ΔHR ANSWER DOWNLOAD EXAMIANS APP
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