When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.

Chemical Reaction Engineering
When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.

Twice

Equal

Half

None of these

Twice

Equal

Half

None of these

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Chemical Reaction Engineering
A catalyst in a chemical reaction __________ free energy change in the reaction.

Either A or B; depends on the type of catalyst

Neither A nor B

Decreases

Increases

Either A or B; depends on the type of catalyst

Neither A nor B

Decreases

Increases

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Chemical Reaction Engineering
Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation?

The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process

Langmuir

There is no dynamic equilibrium between successive layer

None of these

The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process

Langmuir

There is no dynamic equilibrium between successive layer

None of these

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Chemical Reaction Engineering
Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

Consecutive

Third order

None of these

Zero order

Consecutive

Third order

None of these

Zero order

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Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Desorption of C

Surface reaction between absorbed A and absorbed B

Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase

Surface reaction between A in the gas phase and absorbed B

Desorption of C

Surface reaction between absorbed A and absorbed B

Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase

Surface reaction between A in the gas phase and absorbed B

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Chemical Reaction Engineering
Rate of a chemical reaction is not affected by the

Temperature

Reactant's concentration

Number of molecules of reactants taking part in the reaction

Catalyst

Temperature

Reactant's concentration

Number of molecules of reactants taking part in the reaction

Catalyst

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Chemical Reaction Engineering

Chemical Reaction Engineering When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.

Chemical Reaction Engineering A catalyst in a chemical reaction __________ free energy change in the reaction.

Chemical Reaction Engineering Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation?

Chemical Reaction Engineering Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

Chemical Reaction Engineering For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Chemical Reaction Engineering Rate of a chemical reaction is not affected by the

Chemical Reaction Engineering
When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.

Chemical Reaction Engineering
A catalyst in a chemical reaction __________ free energy change in the reaction.

Chemical Reaction Engineering
Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation?

Chemical Reaction Engineering
Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Chemical Reaction Engineering
Rate of a chemical reaction is not affected by the