Chemical Reaction Engineering
Velocity of a reaction depends upon the

Temperature at which the reaction is carried
All of these
Concentration of the reactants
Nature of the reactants

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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

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

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Chemical Reaction Engineering
For a heterogeneous catalytic 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
Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
The surface of the catalyst does not play an important role during reaction

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