Chemical Engineering

Question: In case of unimolecular type elementary reaction, , plug flow reactor as compared to mixed reactor is
[A].

more

[B].

same

[C].

less

[D].

unpredictable

Answer: Option A

Explanation:

No answer description available for this question.

Question: For identical flow rate, feed composition and for elementary first order reactions, ‘N’ equal sized mixed reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for constant density systems. This is true, when the value of ‘N’ is
[A].

1

[B].

>1

[C].

∞

[D].

≥1

Answer: Option C

Explanation:

No answer description available for this question.

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.