"A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction."

Chemical Reaction Engineering
"A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction."

Inner catalyst core of radius R/2 does not participate in reaction

Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1

Inner catalyst core of radius 7R/8 does not participate in reaction

Inner catalyst core of radius R/8 does not participate in reaction

Inner catalyst core of radius R/2 does not participate in reaction

Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1

Inner catalyst core of radius 7R/8 does not participate in reaction

Inner catalyst core of radius R/8 does not participate in reaction

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Chemical Reaction Engineering
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of

Chanelling

Dead zone

Bypass

Ideal plug flow

Chanelling

Dead zone

Bypass

Ideal plug flow

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Chemical Reaction Engineering
Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.

Increases

Decreases

Remains unchanged

Unpredictable from the data

Increases

Decreases

Remains unchanged

Unpredictable from the data

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Chemical Reaction Engineering
A catalyst loses its activity due to

All of these

Loss in surface area of the active component

Agglomeration of metal particles caused by thermal sintering of the solid surface

Covering of the catalytic active sites by a foregin substance

All of these

Loss in surface area of the active component

Agglomeration of metal particles caused by thermal sintering of the solid surface

Covering of the catalytic active sites by a foregin substance

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Chemical Reaction Engineering
If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is

Just feasible

Very much feasible

Unpredictable as ΔG is no measure of feasibility of a reaction

Not feasible

Just feasible

Very much feasible

Unpredictable as ΔG is no measure of feasibility of a reaction

Not feasible

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Chemical Reaction Engineering
Reverse reaction in a chemical equilibrium is favoured by the

Increase in the concentration of oneof the products

Removal of one of the products regularly

Increase in the concentration of one of the reactants

None of these

Increase in the concentration of oneof the products

Removal of one of the products regularly

Increase in the concentration of one of the reactants

None of these

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Chemical Reaction Engineering

Chemical Reaction Engineering For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of

Chemical Reaction Engineering Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.

Chemical Reaction Engineering A catalyst loses its activity due to

Chemical Reaction Engineering If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is

Chemical Reaction Engineering Reverse reaction in a chemical equilibrium is favoured by the

Chemical Reaction Engineering
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of

Chemical Reaction Engineering
Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.

Chemical Reaction Engineering
A catalyst loses its activity due to

Chemical Reaction Engineering
If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is

Chemical Reaction Engineering
Reverse reaction in a chemical equilibrium is favoured by the