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CHEMICAL REACTION ENGINEERING

Chemical Reaction Engineering
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is

9210°K
8621°K
8987°K
8764°K

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Chemical Reaction Engineering
Find a mechanism that is consistent with the rate equation and reaction given below: 2A + B → A₂B, ( - rA) = k.CA.CB

A + B ⇋ AB;AB + A → A₂B
A + A ⇋ AA;AA + B → A₂B
A + B ⇋ AB ; AB + A → A₂B
A + A ⇋ AA;AA + B → A₂B

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Chemical Reaction Engineering
At a given temperature, K₁, K₂ and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH₄(g) + H₂O(g) ⇋ CO(g) + 3H₂(g), CO(g) + H₂O(g) ⇋ CO₂(g) + H₂(g) CH₄(g) + 2H₂O(g) ⇋ CO₂(g) + 4H₂(g) Then K₁, K₂ and K3 are related as:

K3 = K₁.K₂
K3 = (K₁.K₂)0.5
K3(K₁+K₂)/2
K3 = (K₁.K₂)2

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

Kinetic
Activation
Potential
None of these

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Chemical Reaction Engineering
For a fluidised bed reactor, the most suitable/relevant model is a __________ model.

Plug flow
None of these
Bubbling bed
Tank in series

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