Chemical Reaction Engineering
A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are

Equal in size
None of these
Of such size that the ratio of their volumes is < 5
Of different sizes

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Chemical Reaction Engineering
A Catalyst

Increases the equilibrium concentration of the product
Changes the equilibrium constant of the reaction
None of these
Shortens the time to reach the equilibrium

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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
Value of threshold energy decreases
Increased temperature reduces the activation energy
Fraction of molecules having threshold energy increases

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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
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 catalyst does not form an intermediate complex with the reactant
The surface of the catalyst does not play an important role during reaction

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