Chemical Reaction Engineering

Question: ‘N’ plug flow reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for __________ order reactions.
[A].

first

[B].

second

[C].

third

[D].

any

Answer: Option D

Explanation:

No answer description available for this question.

Question: In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is
[A].

more

[B].

less

[C].

same

[D].

either (a) or (b), depends on other factors

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of a consecutive unimolecular type first order reaction , the concentration of component __________ increases continuously with time.
[A].

S

[B].

R

[C].

A

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: For a __________ order chemical reaction, , the fractional conversion of reactant ‘A’ is proportional to time.
[A].

zero

[B].

first

[C].

second

[D].

third

Answer: Option A

Explanation:

No answer description available for this question.

Question: For a __________ order chemical reaction, , the half life period is independent of the initial concentration of the reactant A.
[A].

zero

[B].

first

[C].

second

[D].

third

Answer: Option B

Explanation:

No answer description available for this question.

Question: A rise in temperature
[A].

normally tends to increase the reaction rate.

[B].

does not affect a catalysed reaction.

[C].

does not affect photo-chemical reaction rates.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: A catalyst
[A].

initiates a reaction.

[B].

lowers the activation energy of reacting molecules.

[C].

is capable of reacting with any one of the reactants.

[D].

can not be recovered chemically unchanged at the end of a chemical reaction.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an ideal P.F.R. at steady state conditions
[A].

the composition of reactants remains constant along a flow path.

[B].

the conversion of the reactant varies from point to point along a flow path.

[C].

there is no lateral mixing of fluid.

[D].

there may be diffusion along the flow path.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an ideal mixed reactor (at steady state), the
[A].

space time is equivalent to holding time for constant density systems.

[B].

composition throughout the reactor remains same.

[C].

exit stream has the same composition as the fluid within the reactor.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)
[A].

increases

[B].

decreases

[C].

remains same

[D].

increases linearly

Answer: Option A

Explanation:

No answer description available for this question.