Chemical Engineering - Chemical Reaction Engineering

6. 

In Langmuir treatment of adsorption,

A. whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule.
B. whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site.
C. all the adsorption does not take place by the same mechanism.
D. extent of adsorption is more than one complete monomolecular layer on the surface.

Answer: Option B

Explanation:

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7. 

Organic catalysts differ from the inorganic catalyst in the sense that the former is

A. active at cryogenic temperatures only.
B. prohibitively costly.
C. proteinous in nature.
D. active at very high temperature only.

Answer: Option C

Explanation:

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8. 

An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction

A. is maximum at the inlet of the reactor.
B. goes through a maximum along the length of the reactor.
C. goes through a minimum along the length of the reactor.
D. is maximum at the exit of the reactor.

Answer: Option A

Explanation:

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9. 

Pick out the wrong statement.

A. Exit age description function (E) and internal age distribution function (I) are related as, .
B. Chmisorption studies are useful in the determination of catalyst surface area and pore size distribution.
C. A higher temperature favours the reaction of higher activation energy.
D. A catalyst increases the potential energy barrier over which the reactants must pass to form products.

Answer: Option D

Explanation:

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10. 

For an ideal plug flow reactor, the value of Peclet number is

A. 0
B.
C. 1
D. 10

Answer: Option A

Explanation:

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