Chemical Reaction Engineering

Question: A first order homogeneous reaction of the type X Y Z (consecutive reaction) is carried out in a CSTR. Which of the following curves respectively show the variation of the concentration of X, Y and Z with time?
[A].

I, II, III

[B].

III, II, I

[C].

III, I, II

[D].

II, III, i

Answer: Option B

Explanation:

No answer description available for this question.

Question: Most important characteristics of gas-liquid reactors are the
[A].

specific inter-facial area

[B].

liquid hold-up

[C].

both (a) and (b)

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A catalyst is said to be a negative catalyst, ifit
[A].

retards the rate of reaction.

[B].

reduces the value of equilibrium constant.

[C].

does not initiate the reaction.

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: For a tubular flow reactor with uniform concentration and temperature, the independent variable is
[A].

time

[B].

length

[C].

diameter

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: For any reaction, we may write conversion as a function of
[A].

time

[B].

temperature

[C].

concentration

[D].

all (a), (b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: A multiple reaction may be classified as a __________ reaction.
[A].

consecutive or side

[B].

parallel or side

[C].

mixed

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: A reaction which is catalysed by an acid is also catalysed by any substance, which has a tendency to
[A].

lose a proton.

[B].

gain a proton.

[C].

lose an electron

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.
[A].

[B].

[C].

[D].

t ∝ an

Answer: Option B

Explanation:

No answer description available for this question.

Question: A reaction which is catalysed by a base is catalysed by all substances which have a tendency to
[A].

lose a proton

[B].

gain a proton

[C].

gain an electron

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: A catalyst loses its activity due to
[A].

loss in surface area of the active component.

[B].

agglomeration of metal particles caused by thermal sintering of the solid surface.

[C].

covering of the catalytic active sites by a foregin substance.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.