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Chemical Reaction Engineering

Chemical Reaction Engineering
Half life period of decomposition of a liquid 'A' by irreversible first order reaction is 12 minutes. The time required for 75% conversion of 'A' is __________ minutes.

24
18
12
6

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Chemical Reaction Engineering
What is the dispersion number for a plug flow reactor?

1
-1
?

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Chemical Reaction Engineering
A back mix reactor is

Ideal at very low conversion
Same as plug flow reactor (PFR)
Suitable for gas phase reactions
Same as ideal stirred tank reactor

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Chemical Reaction Engineering
Which of the following is a characteristic of an ideal plug flow reactor?

Flat velocity profile
Axial dispersion
Uniform mixing
None of these

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Chemical Reaction Engineering
Enzymes are destroyed, when the

Reaction rate is independent of the reactant's concentration
Temperature is very high
Reactant's concentration is very low
Reactant's concentration is very high

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Chemical Reaction Engineering
The catalytic activity of enzymes is due to their capacity to lower the __________ energy.

Activation
Kinetic
Potential
None of these

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