Chemical Reaction Engineering Mean residence time is equal to the space time, when All of these The temperature, pressure and the density of reaction mixture remains constant throughout the reactor The feed rate is measured at temperature and pressure in the reactor There is no change in number of moles in gaseous reaction All of these The temperature, pressure and the density of reaction mixture remains constant throughout the reactor The feed rate is measured at temperature and pressure in the reactor There is no change in number of moles in gaseous reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds. Catalytic Auto catalytic Series Parallel Catalytic Auto catalytic Series Parallel ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Sometimes, batch process is preferred over continuous process, when the product Neither A nor B Quality & yield can not be achieved in continuous processes, because of long residence time Both A & B Sales demand is fluctuating Neither A nor B Quality & yield can not be achieved in continuous processes, because of long residence time Both A & B Sales demand is fluctuating ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation? There is no dynamic equilibrium between successive layer None of these Langmuir The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process There is no dynamic equilibrium between successive layer None of these Langmuir The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The rate of the heterogenous catalytic reaction A(g) + B(g) ? C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction isA. absorption of A. Absorption of A Surface reaction between A in the gas phase and absorbed B Surface reaction between absorbed A and B in the gas phase Surface reaction between absorbed A and absorbed B Absorption of A Surface reaction between A in the gas phase and absorbed B Surface reaction between absorbed A and B in the gas phase Surface reaction between absorbed A and absorbed B ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Photochemical reaction rate does not depend significantly on temperature, because The energy of reacting molecules exceeds the activation energy by absorption of light None of these It is a reversible reaction It is an exothermic reaction The energy of reacting molecules exceeds the activation energy by absorption of light None of these It is a reversible reaction It is an exothermic reaction ANSWER DOWNLOAD EXAMIANS APP
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