Chemical Reaction Engineering The reason why a catalyst increases the rate of reaction is that, it Increases the activation energy None of these Decreases the molecular collision diameter Decreases the energy barrier for reaction Increases the activation energy None of these Decreases the molecular collision diameter Decreases the energy barrier for reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Signal normally used to study non-ideal flow by stimulus response technique is __________ input. Both A & B Step Pulse Neither A nor B Both A & B Step Pulse Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A backmix reactor Employs mixing in axial direction only Is same as ideal stirred tank reactor Is most suitable for gas phase reaction Is same as plug-flow reactor Employs mixing in axial direction only Is same as ideal stirred tank reactor Is most suitable for gas phase reaction Is same as plug-flow reactor ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.) Thiele modulus (L√(k/D1) Reduced time (vt/V) None of these Reactor dispersion number (D/vL) Thiele modulus (L√(k/D1) Reduced time (vt/V) None of these Reactor dispersion number (D/vL) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is 3 2 0 1 3 2 0 1 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In an ideal mixed reactor (at steady state), the Space time is equivalent to holding time for constant density systems Composition throughout the reactor remains same Exit stream has the same composition as the fluid within the reactor All of these Space time is equivalent to holding time for constant density systems Composition throughout the reactor remains same Exit stream has the same composition as the fluid within the reactor All of these ANSWER DOWNLOAD EXAMIANS APP
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