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Chemical Reaction Engineering

Chemical Reaction Engineering
If Thiele modulus is __________ , then the pore diffusion resistance in a catalyst may be considered as negligible.

< 0.5
∞
0
> 0.5

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Chemical Reaction Engineering
Catalyst carriers

Have very high selectivity
Provide large surface area with a small amount of active material
Inhibit catalyst poisoning
Increase the activity of a catalyst

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Chemical Reaction Engineering
Holding time for flow reactors is __________ the space time, for constant fluid density

Double
None of these
Triple
Equal to

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Chemical Reaction Engineering
Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

None of these
Consecutive
Zero order
Third order

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Chemical Reaction Engineering
A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is

0.5
0.33
Data insufficient, can't be predicted
1

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Chemical Reaction Engineering
With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.

Remains unaffected
Increases
Unpredictable from the data
Decreases

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