Chemical Reaction Engineering

Question: A catalyst inhibitor
[A].

lessens its selectivity.

[B].

may be useful for suppressing undesirable side reactions.

[C].

is added in small quantity during the catalyst manufacture itself.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: A catalyst promoter
[A].

improves the activity of a catalyst.

[B].

acts as a catalyst support.

[C].

itself has very high activity.

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: Catalyst carriers
[A].

have very high selectivity.

[B].

increase the activity of a catalyst.

[C].

provide large surface area with a small amount of active material.

[D].

inhibit catalyst poisoning.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Catalyst is a substance, which __________ chemical reaction.
[A].

increases the speed of a

[B].

decreases the speed of a

[C].

can either increase or decrease the speed of a

[D].

alters the value of equilibrium constant in a reversible

Answer: Option C

Explanation:

No answer description available for this question.

Question: Design of heterogeous catalytic reactor involves consideration of __________ steps.
[A].

only chemical

[B].

only physical

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: For reactions in parallel viz A P (desired product) and A Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a
[A].

batch reactor is preferred over a single CSTR for high yield.

[B].

tubular reactor is preferred over a single CSTR for high yield.

[C].

both (a) and (b).

[D].

single CSTR is the most suitable.

Answer: Option C

Explanation:

No answer description available for this question.

Question: For series reaction, the relative yield
[A].

is always greater for plug-flow reactor than for the single CSTR of the same volume.

[B].

statement in (a) is wrong.

[C].

decreases with increasing conversion.

[D].

both (a) and (c) hold good.

Answer: Option D

Explanation:

No answer description available for this question.

Question: An autothermal reactor is
[A].

most suitable for a second order reaction.

[B].

most suitable for a reversible reaction.

[C].

completely self-supporting in its thermal energy requirements.

[D].

isothermal in nature.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Backmixing is most predominant in
[A].

a well stirred batch reactor.

[B].

a plug-flow reactor.

[C].

a single CSTR.

[D].

CSTR’s connected in series.

Answer: Option C

Explanation:

No answer description available for this question.

Question: With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will
[A].

increase

[B].

decrease

[C].

remain same

[D].

data in insufficient; can’t be predicted

Answer: Option A

Explanation:

No answer description available for this question.