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Chemical Reaction Engineering

Chemical Reaction Engineering
The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is

1
1.5
-0.5
0.5

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Chemical Reaction Engineering
When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is

> 1
1
< 1

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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

0.693τ
0.5τ
τ/0.693
2τ

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Chemical Reaction Engineering
The extent of a reaction is

Dimensionless
Different for reactants and products
All of these
Depends on the stoichiometric co-efficient

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

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Chemical Reaction Engineering
Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.

3
4
8
6

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