Chemical Reaction Engineering A catalyst loses its activity due to Covering of the catalytic active sites by a foregin substance Agglomeration of metal particles caused by thermal sintering of the solid surface Loss in surface area of the active component All of these Covering of the catalytic active sites by a foregin substance Agglomeration of metal particles caused by thermal sintering of the solid surface Loss in surface area of the active component All of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following will give maximum gas conversion? Plug-flow catalytic reactor Semi-fluidised bed reactor Fluidised bed reactor Fixed bed reactor Plug-flow catalytic reactor Semi-fluidised bed reactor Fluidised bed reactor Fixed bed reactor ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following is a characteristic of an ideal plug flow reactor? Uniform mixing None of these Flat velocity profile Axial dispersion Uniform mixing None of these Flat velocity profile Axial dispersion ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Reaction rate of a first order reaction, which is half completed in 23 minutes will be 0.03 sec⁻¹ 0.03 hr⁻¹ 0.05 min⁻¹ 0.03 min⁻¹ 0.03 sec⁻¹ 0.03 hr⁻¹ 0.05 min⁻¹ 0.03 min⁻¹ ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are 1 & 1 2 & 1 11 & 2 2 && 2 1 & 1 2 & 1 11 & 2 2 && 2 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the 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 Collision frequency increases ANSWER DOWNLOAD EXAMIANS APP
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