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Chemical Reaction Engineering

Chemical Reaction Engineering
A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.

Less than
More than
Equal to or more than
Equal to

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Chemical Reaction Engineering
From Arhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is

K cal
°K
K cal. °K
K cal/°K

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Chemical Reaction Engineering
When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.

Is smaller than
Can be either greater or smaller than (depends on the type of reaction)
Equals
Is greater than

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

Axial dispersion
None of these
Flat velocity profile
Uniform mixing

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Chemical Reaction Engineering
If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to

(E + ED) where ED is activation due to diffusion
(E + ED)/2
The intrinsic activation energy E
ED/2

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Chemical Reaction Engineering
For series reaction, the relative yield

Statement in A is wrong
Is always greater for plug-flow reactor than for the single CSTR of the same volume
Decreases with increasing conversion
Both A and C hold good

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