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State true or false.

The fluidized bed reactor is used for mixed flow of solids.

(a) The fluidized bed reactor is used for mixed flow of solids.

(b) True

(c) False

The question was posed to me in an international level competition.

Origin of the question is Design of Fluid Particle Reactors in division Fluid-Particle Reactions: Kinetics of Chemical Reaction Engineering

If weight of all solids in the reactor is 300kg and the feed rate of solids is \(\frac{50kg}{hr},\) then the mean residence time(in hrs) of a material of a given size for mixed flow of a mixture of sizes of unchanging size particles is ____

(a) 7

(b) 6

(c) 4

(d) 3

I had been asked this question during an interview.

The query is from Design of Fluid Particle Reactors topic in division Fluid-Particle Reactions: Kinetics of Chemical Reaction Engineering

For mixed flow of particles containing a single unchanging size and uniform gas composition, the fraction unconverted for film resistance controlling is ____

(a) \(\int_0^τ\)(-\(\frac{t}{τ}\))\(\frac{e}{t}^\frac{-t}{t}\) dt

(b) \(\int_0^τ\)(1 – \(\frac{t}{τ}\))\(\frac{e}{t}^\frac{-t}{t}\) dt

(c) \(\int_0^τ\)(1 –\(\frac{t}{τ}\))dt

(d) \(\int_0^τ\)(1 – \(\frac{t}{τ}\))\(\frac{e}{t}^\frac{-t}{t}\) dt

I had been asked this question by my college professor while I was bunking the class.

The question is from Design of Fluid Particle Reactors in portion Fluid-Particle Reactions: Kinetics of Chemical Reaction Engineering

Which of the following does not provide plug flow of Solid – fluids?

(a) Fluidised bed reactor

(b) Countercurrent flow in blast furnaces

(c) Crossflow in moving belt

(d) Concurrent flow in driers

This question was posed to me during a job interview.

I’m obligated to ask this question of Design of Fluid Particle Reactors in section Fluid-Particle Reactions: Kinetics of Chemical Reaction Engineering

If \(\overline{X_{Ri}}\) is the mean conversion of a reactant of particle size Ri, Rm is the particle of maximum size in the feed and F(Ri) is the fraction of Ri fed to the reactor, then the mean conversion of solids of a particular size ‘i’ leaving a plug flow reactor converting a mixture of particles of varying sizes is ____

(a) \(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[1- X(B)Ri]\(\frac{F(Ri)}{F} \)

(b) 1-\(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[ XRi]\(\frac{F(Ri)}{F} \)

(c) 1-\(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[1-X(B)Ri]F (Ri)

(d) 1-\(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[1-X(B)Ri] \(\frac{F(Ri)}{F} \)

The question was posed to me during an online interview.

Enquiry is from Design of Fluid Particle Reactors in portion Fluid-Particle Reactions: Kinetics of Chemical Reaction Engineering

The rate determining step of a series of reactions is the one ____

(a) That is fastest

(b) That is slowest

(c) That does not contribute to the reaction

(d) That does not occur

This question was posed to me by my school teacher while I was bunking the class.

My query is from Reducing the Size of Kinetic Models in portion Elements of Reaction Kinetics of Chemical Reaction Engineering

The unit of activation energy is ____

(a) mol

(b) mol.K

(c) K

(d) J/ mol

This question was posed to me in quiz.

The query is from Reaction Kinetics Elements topic in chapter Elements of Reaction Kinetics of Chemical Reaction Engineering

State true or false.

Decomposition of nitrogen pentoxide follows second order mechanism, assuming that the kinetics is controlled by a single step mechanism.

(a) Decomposition of nitrogen pentoxide follows second order mechanism, assuming that the kinetics is controlled by a single step mechanism.

(b) True

(c) False

This question was addressed to me in an online interview.

Query is from Reducing the Size of Kinetic Models in section Elements of Reaction Kinetics of Chemical Reaction Engineering

State true or false.

The value of frequency factor affects the temperature sensitivity of reaction.

(a) The value of frequency factor affects the temperature sensitivity of reaction.

(b) True

(c) False

I got this question in my homework.

The question is from Reaction Kinetics Elements topic in section Elements of Reaction Kinetics of Chemical Reaction Engineering

For a reaction with negative order n, which one of the following is true about reaction rate constant?

(a) k = (-rA)

(b) k = 1

(c) k = \(\frac{-r_A}{C_A^n} \)

(d) k =(-rA) × CA^n

I have been asked this question during an interview.

The origin of the question is Reaction Kinetics Elements in section Elements of Reaction Kinetics of Chemical Reaction Engineering

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