Chemical Reaction Engineering
The units of frequency factor in Arhenious equation

Depend on temperature, pressure etc. of the reaction
Depend on the order of the reaction
Are cycles per unit time
Are the same as those of the rate constant

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Chemical Reaction Engineering
Pick out the wrong statement pertaining to space velocity of flow reactors.

The unit of space velocity is (time)⁻¹
The space velocity of 3 hr⁻¹ means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour
None of these
The space velocity of 3 hr⁻¹ means that one third reactor volume of feed at specified conditions are being fed into the reactor

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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
The surface of the catalyst does not play an important role during 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

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