Chemical Reaction Engineering

Question: In an exothermic reaction, the energy of the reacting substances as compared to that of products is
[A].

more

[B].

less

[C].

same

[D].

either (a) or (b), depends on order of reaction.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A photochemical reaction is __________ light.
[A].

initiated by

[B].

accompanied with emission of

[C].

catalysed by

[D].

used to convert heat energy into

Answer: Option A

Explanation:

No answer description available for this question.

Question: From Arhenius law, a plot of logeK versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is
[A].

k cal

[B].

k cal/°K

[C].

°K

[D].

k cal. °K

Answer: Option C

Explanation:

No answer description available for this question.

Question: A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)
[A].

∝ CA.

[B].

∝ 1/CA.

[C].

independent of temperature.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: With increase in K2/K1 in case of a unimolecular type elementary reactions, the fractional yield of ‘R’ in mixed reactor (for a given conversion of ‘A’)
[A].

decreases

[B].

increases

[C].

increases linearly

[D].

remains same

Answer: Option A

Explanation:

No answer description available for this question.

Question: A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are
[A].

equal in size.

[B].

of different sizes.

[C].

of such size that the ratio of their volumes is < 5.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: The catalytic activity of enzymes is due to their capacity to lower the __________ energy.
[A].

activation

[B].

potential

[C].

kinetic

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.
[A].

film diffusion

[B].

diffusion through ash layer

[C].

chemical reaction

[D].

either (a), (b) or (c)

Answer: Option C

Explanation:

No answer description available for this question.

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.