Chemical Engineering - Chemical Reaction Engineering

26. 

Non-catalytic fluid-solid reactions are represented by __________ model.

A. continuous reaction
B. unreacted core
C. both (a) and (b)
D. neither (a) and (b)

Answer: Option C

Explanation:

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27. 

A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be

A.
B. 0.5τ
C. τ/0.693
D. 0.693τ

Answer: Option A

Explanation:

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28. 

On application of pressure to the equilibrium system, ice water ; which of the following phenomenon will occur ?

A. Water will evaporate
B. Equilibrium will not be attained
C. More ice will be formed
D. More water will be formed.

Answer: Option D

Explanation:

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29. 

Participation of __________ is involved in the occurrence of a chemical reaction.

A. protons
B. neutrons
C. electrons
D. none of these

Answer: Option C

Explanation:

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30. 

Promoter.

A. initiates a chemical reaction and is a catalyst by itself.
B. atlers the position of equilibrium in a reversible reaction.
C. increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals.
D. all (a), (b) and (c).

Answer: Option C

Explanation:

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