Chemical Reaction Engineering
The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature))

1000
500
400
600

ANSWER DOWNLOAD EXAMIANS APP

Chemical Reaction Engineering
Pick the WRONG design guideline for a reactor in which the reactions, A → R (desired) and A → S (undesired) are to take place. The ratio of the reaction rates is rR/rS = (k₁/k₂).Csub>Aa-b

Use high pressure and eliminate inerts, when a > b
Avoid recycle, when a > b
Use batch reactor or plug flow reactor, when a > b
Use CSTR with a high conversion, when a > b

ANSWER DOWNLOAD EXAMIANS APP

Chemical Reaction Engineering
For a heterogeneous catalytic reaction

Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
The catalyst does not form an intermediate complex with the reactant
A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important
The surface of the catalyst does not play an important role during reaction

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Chemical Reaction Engineering