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

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

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

The space velocity of 3 hr⁻¹ means that one third reactor volume of feed at specified conditions are being fed into the reactor
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

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