Chemical Reaction Engineering
Which of the following is not a theory of homogeneous reaction?

Radiation hypothesis
Collision theory and activated complex theory
None of these
Chain reaction theory

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Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Desorption of C
Surface reaction between A in the gas phase and absorbed B
Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase
Surface reaction between absorbed A and absorbed B

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Chemical Reaction Engineering
Semibatch reactor is preferred, when a/an

A highly exothermic reaction is to be controlled
Undersirable side reaction (at high concentration of one of the reactants) is to be avoided
A gas is to be reacted with liquid (e.g. hydrogenation of fat)
All of these

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