Chemical Reaction Engineering

Question: Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as
[A].

DE = DM + DK

[B].

[C].

DE = DM . DE

[D].

DE = DN/DE

Answer: Option B

Explanation:

No answer description available for this question.

Question: Signal normally used to study non-ideal flow by stimulus response technique is __________ input.
[A].

pulse

[B].

step

[C].

both (a) & (b)

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: The importance of diffusion in a catalyst are increased by
[A].

large catalyst particle size.

[B].

an active surface of the catalyst.

[C].

small pore diameter.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Radioactive decay follows __________ order kinetics.
[A].

first

[B].

second

[C].

third

[D].

zero.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Helium-mercury method is used for the measurement of the __________ of the catalyst.
[A].

surface area

[B].

porosity

[C].

pore volume

[D].

both (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: 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:

No answer description available for this question.

Question: 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:

No answer description available for this question.

Question: The single parameter model proposed for describing non-ideal flow is the __________ model.
[A].

tank in series

[B].

dispersion

[C].

both (a) & (b)

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: With increase in temperature, the equilibrium __________ rises in case of endothermic reaction.
[A].

constant

[B].

conversion

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option B

Explanation:

No answer description available for this question.