Chemical Reaction Engineering

Question: A first order reaction requires two equal sized CSTR. The conversion is
[A].

less when they are connected in series.

[B].

more when they are connected in series.

[C].

more when they are connected in parallel.

[D].

same whether they are connected in series or in parallel.

Answer: Option B

Explanation:

No answer description available for this question.

Question: For multiple reactions, the flow pattern within the vessel affects the
[A].

size requirement

[B].

distribution of reaction products

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: For an autocatalytic reactor, the suitable reactor set up is
[A].

P.F. reactors in series.

[B].

CSTR in series.

[C].

CSTR followed by P.F. reactor.

[D].

P.F. reactor followed by CSTR.

Answer: Option C

Explanation:

No answer description available for this question.

Question: With the same reaction time, initial concentration and feed rate, the reaction 2A B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be
[A].

higher in P.F. reactor

[B].

higher in CSTR

[C].

same in both the reactors

[D].

data insufficient; can’t be predicted

Answer: Option A

Explanation:

No answer description available for this question.

Question: For all positive reaction orders for a particular duty,
[A].

mixed reactor is always larger than the plug-flow reactor.

[B].

ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order.

[C].

reactor size is independent of the type of flow.

[D].

density variation during reaction affects design.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A space velocity of 5 hr-1 means that
[A].

five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour.

[B].

after every 5 hours, reactor is being filled with the feed.

[C].

cent per cent conversion can be achieved in at least 5 hours.

[D].

a fixed conversion of a given batch of feed takes 5 hours.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A first order irreversible reaction, A B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.
[A].

both conversion as well as concentration are same

[B].

conversion in both will be the same but concentrations will be different

[C].

both the conversion as well as concentrations will be different

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: A second order reaction of the form A + B C is called a pseudo-first order reaction, when
[A].

CA0 = CB0

[B].

CA0 > CB0

[C].

CB0 > CA0

[D].

CB0 ≥ CB0

Answer: Option D

Explanation:

No answer description available for this question.

Question: Oil is hydrogenated using nickel catalyst in a __________ reactor.
[A].

batch

[B].

slurry

[C].

fluidised bed

[D].

fixed bed

Answer: Option B

Explanation:

No answer description available for this question.

Question: A stirred tank reactor compared to tubular-flow reactor provides
[A].

more uniform operating conditions.

[B].

permits operation at the optimum temperature for a long reaction time.

[C].

higher overall selectivity for a first order consecutive reaction.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.