Chemical Reaction Engineering
Consider the 'n' th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot?

Ln CA0 Vs ln t1/2
CA0 Vs t1/2
CA0 Vs ln t1/2
Ln CA0 Vs t1/2

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Chemical Reaction Engineering
In an ideal P.F.R. at steady state conditions

The conversion of the reactant varies from point to point along a flow path
There is no lateral mixing of fluid
The composition of reactants remains constant along a flow path
There may be diffusion along the flow path

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Chemical Reaction Engineering
Pick the WRONG design guideline for a reactor in which the reactions, A → R (desired) and A → S (undesired) are to take place. The ratio of the reaction rates is rR/rS = (k₁/k₂).Csub>Aa-b

Use batch reactor or plug flow reactor, when a > b
Use high pressure and eliminate inerts, when a > b
Use CSTR with a high conversion, when a > b
Avoid recycle, when a > b

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