Chemical Reaction Engineering Velocity of a chemical reaction None of these Decreases with increase of reactant concentration Decreases with increase in temperature Increases with increase of pressure of reactants for all reactions None of these Decreases with increase of reactant concentration Decreases with increase in temperature Increases with increase of pressure of reactants for all reactions ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The reactions of high molecularity are rare, because Of requirement of very large concentration for such reactions Of low probability of many body collisions Of very large activation energy of many bodies Many body collisions are not favoured energetically Of requirement of very large concentration for such reactions Of low probability of many body collisions Of very large activation energy of many bodies Many body collisions are not favoured energetically ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In case of a/an __________ chemical reaction, conversion increases with the rise in temperature. Irreversible exothermic Reversible endothermic Reversible exothermic Irreversible endothermic Irreversible exothermic Reversible endothermic Reversible exothermic Irreversible endothermic 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) None of these Reactor dispersion number (D/vL) Reduced time (vt/V) Thiele modulus (L√(k/D1) None of these Reactor dispersion number (D/vL) Reduced time (vt/V) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by Reaction External mass transfer Diffusion within the pellet None of these Reaction External mass transfer Diffusion within the pellet None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In the hydrodealkylation of toluene to benzene, the following reactions occur:C₇H₈ + H₂ → C₆H₆ + CH₄2C₆H₆ ⇋ C₁₂H₁₀ + H₂Toluene and hydrogen are fed to a reactor in a molar ratio 1:5.80% of the toluene gets converted and the selectivity of benzene(defined as moles of benzene formed/moles of toluene converted) is 90%. The fractional conversion of hydrogen is 0.152 0.136 0.16 0.144 0.152 0.136 0.16 0.144 ANSWER DOWNLOAD EXAMIANS APP
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