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
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

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

There is no dynamic equilibrium between successive layer

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Chemical Reaction Engineering
Threshold energy in a reaction is equal to the

Normal energy of reactants

Activation energy

Neither A nor B

Sum of A & B

Normal energy of reactants

Activation energy

Neither A nor B

Sum of A & B

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Chemical Reaction Engineering
The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

D2

D1.5

√d

D

D2

D1.5

√d

D

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Chemical Reaction Engineering
The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

Value of threshold energy decreases

Collision frequency increases

Increased temperature reduces the activation energy

Fraction of molecules having threshold energy increases

Value of threshold energy decreases

Collision frequency increases

Increased temperature reduces the activation energy

Fraction of molecules having threshold energy increases

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Chemical Reaction Engineering
Organic catalysts differ from the inorganic catalyst in the sense that the former is

Active at cryogenic temperatures only

Prohibitively costly

Active at very high temperature only

Proteinous in nature

Active at cryogenic temperatures only

Prohibitively costly

Active at very high temperature only

Proteinous in nature

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Chemical Reaction Engineering
The energy of activation of a chemical reaction

Is the minimum energy which the molecules must have before the reaction can take place

Varies as fifth power of the temperature

Both B and C

Is same as heat of reaction at constant pressure

Is the minimum energy which the molecules must have before the reaction can take place

Varies as fifth power of the temperature

Both B and C

Is same as heat of reaction at constant pressure

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Chemical Reaction Engineering

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 Threshold energy in a reaction is equal to the

Chemical Reaction Engineering The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

Chemical Reaction Engineering The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

Chemical Reaction Engineering Organic catalysts differ from the inorganic catalyst in the sense that the former is

Chemical Reaction Engineering The energy of activation of a chemical 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
Threshold energy in a reaction is equal to the

Chemical Reaction Engineering
The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

Chemical Reaction Engineering
The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

Chemical Reaction Engineering
Organic catalysts differ from the inorganic catalyst in the sense that the former is

Chemical Reaction Engineering
The energy of activation of a chemical reaction