Chemical Reaction Engineering
A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be

0.5τ
τ/0.693
0.693τ

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Chemical Reaction Engineering
A Catalyst

None of these
Shortens the time to reach the equilibrium
Increases the equilibrium concentration of the product
Changes the equilibrium constant of the reaction

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