If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.

Chemical Reaction Engineering
If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.

Ash layer

Film

Pore

None of these

Ash layer

Film

Pore

None of these

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Chemical Reaction Engineering
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

Equal in size

None of these

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

Of different sizes

Equal in size

None of these

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

Of different sizes

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Chemical Reaction Engineering
Space time in flow reactor is

The reciprocal of the space velocity

A measure of its capacity

Both A and B

Usually equal to the residence time

The reciprocal of the space velocity

A measure of its capacity

Both A and B

Usually equal to the residence time

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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?

There is no dynamic equilibrium between successive layer

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

None of these

There is no dynamic equilibrium between successive layer

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

None of these

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Chemical Reaction Engineering
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are

Mostly irreversible

Always irreversible

Insensitive to temperature changes

Highly temperature sensitive

Mostly irreversible

Always irreversible

Insensitive to temperature changes

Highly temperature sensitive

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Chemical Reaction Engineering
Photo-chemical reactions occur in presence of

Darkness

Monochromatic radiation only

Solid catalysts

Sunlight

Darkness

Monochromatic radiation only

Solid catalysts

Sunlight

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Chemical Reaction Engineering

Chemical Reaction Engineering If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.

Chemical Reaction Engineering 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

Chemical Reaction Engineering Space time in flow reactor is

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 The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are

Chemical Reaction Engineering Photo-chemical reactions occur in presence of

Chemical Reaction Engineering
If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.

Chemical Reaction Engineering
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

Chemical Reaction Engineering
Space time in flow reactor is

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
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are

Chemical Reaction Engineering
Photo-chemical reactions occur in presence of