Chemical Engineering - Chemical Reaction Engineering

26. 

In a reversible reaction, a catalyst increases the rate of forward reaction

A. only.
B. to a greater extent than that of the backward reaction.
C. and decreases that of the backward reaction.
D. and the backward reaction equally.

Answer: Option D

Explanation:

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27. 

Maximum equilibrium conversion for endothermic reaction is obtained at the __________ temperature.

A. highest possible
B. lowest possible
C. intermediate
D. room

Answer: Option A

Explanation:

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28. 

When an exothermic reversible reaction is conducted adiabatically, the rate of reaction

A. continuously increases.
B. continuously decreases.
C. passes through a maximum.
D. passes through a minimum.

Answer: Option C

Explanation:

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29. 

For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

A. 1
B. 0.5
C. 0.1
D. 0

Answer: Option C

Explanation:

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30. 

The rate equation for the reaction represented by, is given by - rx = K1 . Cx/(1 + K2 Cx). At high value of Cx (i.e.., K2Cx > > 1), the order of the reaction and the rate constant are respectively

A. zero order & K1/K2
B. zero order & K1
C. first order & K1
D. first order & K1/K2

Answer: Option A

Explanation:

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