Chemical Reaction Engineering

Question: In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a __________ reaction.
[A].

non-catalytic homogeneous

[B].

non-catalytic heterogeneous

[C].

catalytic homogenous

[D].

catalytic heterogeneous

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of a P.F.R., there
[A].

may be lateral mixing of fluid.

[B].

should not be any mixing along the flow path.

[C].

both (a) and (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: ‘n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume
[A].

V/n

[B].

V

[C].

V.n

[D].

1/V

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ resistance is not involved in the combustion of a carbon particle.
[A].

Gas film

[B].

Ash

[C].

Chemical reaction

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: ‘If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process’. The diffusivity under this condition is called ‘Knudsen diffusivity’, which is affected by the
[A].

pressure

[B].

temperature

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option B

Explanation:

No answer description available for this question.

Question: During manufacture of H2SO4, the oxidation of SO2 to SO3 by oxygen is an en-dothermic reaction. The yield of SO3 will be maximised, if the
[A].

temperature is increased.

[B].

pressure is reduced.

[C].

temperature is increased and pressure is reduced.

[D].

temperature is reduced and pressure is increased.

Answer: Option D

Explanation:

No answer description available for this question.

Question: B.E.T. method of finding out surface area of a catalyst, uses the extension of __________ isotherm.
[A].

Langmuir

[B].

Freundlich

[C].

Tempkin

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ gas is normally employed in B.E.T.method of finding out the surface area of catalyst.
[A].

N2

[B].

H2

[C].

CO2

[D].

He

Answer: Option A

Explanation:

No answer description available for this question.

Question: ‘Unreacted core model’ represents the reaction involving
[A].

combustion of coal particles.

[B].

roasting of sulphide ores.

[C].

manufacture of carbon disulphide from elements.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ catalytic reaction is involved in the thermal cracking of gas oil.
[A].

Homogeneous

[B].

Homogeneous non

[C].

Heterogeneous

[D].

Heterogeneous non

Answer: Option A

Explanation:

No answer description available for this question.