Chemical Reaction Engineering
The concentration of A in a first order reaction, A → B, decreases

Logarithmically with time
Linearly with time
Very abruptly towards the end of the reaction
Exponentially with time

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Chemical Reaction Engineering
Space velocity

Is the maximum feed rate pre unit volume of reactor for a given conversion
Describes the extensive operating characteristics of a tubular flow reactor
Is a measure of the ease of the reaction
All of these

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Chemical Reaction Engineering
Mean residence time is equal to the space time, when

The temperature, pressure and the density of reaction mixture remains constant throughout the reactor
The feed rate is measured at temperature and pressure in the reactor
There is no change in number of moles in gaseous reaction
All of these

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