Chemical Reaction Engineering
In the reversible reaction of the type, A + B ⇋ AB, in general

The combination reaction will be endothermic, while the dissociation reaction will be exothermic
Both forward and backward reactions will be exothermic
Neither of the reactions will be en-dothermic
The combination reaction will be exothermic, while the dissociation reaction will be endothermic

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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
Reactor dispersion number (D/vL)
Thiele modulus (L√(k/D1)
Reduced time (vt/V)

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