Chemical Reaction Engineering
For a homogeneous reaction of nth order, the dimension of the rate constant is given by

(concentration)n - 1/(time)
(concentration)1 - n/(time)
None of these
L/(time)n

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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.)

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

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Chemical Reaction Engineering
Batch process is preferred over continuous process, when the

Sales demand of product is not steady
Product yields and quality can not be achieved in continuous process, because of long residence time
All of these
Same equipment can not be used for several processes of the same nature

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