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

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

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Chemical Reaction Engineering
Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

None of these
Reduced time (vt/V)
Thiele modulus (L√(k/D1)
Reactor dispersion number (D/vL)

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