Chemical Reaction Engineering For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is 22 11 2 4 22 11 2 4 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order. Second First None of these Zero Second First None of these Zero ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Photochemical reaction rate does not depend significantly on temperature, because It is an exothermic reaction None of these The energy of reacting molecules exceeds the activation energy by absorption of light It is a reversible reaction It is an exothermic reaction None of these The energy of reacting molecules exceeds the activation energy by absorption of light It is a reversible reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Half life period of a chemical reaction is The time required to reduce the concentration of the reacting substance to half its initial value Half of the space time of a reaction None of these Half of the residence time of a reaction The time required to reduce the concentration of the reacting substance to half its initial value Half of the space time of a reaction None of these Half of the residence time of a reaction 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. Surface reaction between absorbed A and absorbed B Surface reaction between absorbed A and B in the gas phase Surface reaction between A in the gas phase and absorbed B Absorption of A Surface reaction between absorbed A and absorbed B Surface reaction between absorbed A and B in the gas phase Surface reaction between A in the gas phase and absorbed B Absorption of A ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance. Film diffusion Chemical reaction Diffusion through ash layer Either A, B or C Film diffusion Chemical reaction Diffusion through ash layer Either A, B or C ANSWER DOWNLOAD EXAMIANS APP
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