Chemical Reaction Engineering The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the Collision frequency increases Fraction of molecules having threshold energy increases Increased temperature reduces the activation energy Value of threshold energy decreases Collision frequency increases Fraction of molecules having threshold energy increases Increased temperature reduces the activation energy Value of threshold energy decreases ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Half life period of a first order irreversible reaction A → B is Ln k/2 Ln 2/k K/2 Ln 0.5/k Ln k/2 Ln 2/k K/2 Ln 0.5/k ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Promoter is added to the catalyst to improve its Sensitivity Surface area Porosity None of these Sensitivity Surface area Porosity None of these 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 Ash layer None of these Pore Film Ash layer None of these Pore ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A catalyst inhibitor May be useful for suppressing undesirable side reactions All of these Lessens its selectivity Is added in small quantity during the catalyst manufacture itself May be useful for suppressing undesirable side reactions All of these Lessens its selectivity Is added in small quantity during the catalyst manufacture itself ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A stirred tank reactor compared to tubular-flow reactor provides Permits operation at the optimum temperature for a long reaction time Higher overall selectivity for a first order consecutive reaction More uniform operating conditions All of these Permits operation at the optimum temperature for a long reaction time Higher overall selectivity for a first order consecutive reaction More uniform operating conditions All of these ANSWER DOWNLOAD EXAMIANS APP
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