The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)

Chemical Reaction Engineering
The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)

ΔHA + ΔHR

E

E + ΔHA - ΔHR

E + ΔHA

ΔHA + ΔHR

E

E + ΔHA - ΔHR

E + ΔHA

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Chemical Reaction Engineering
Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Thiele modulus (L√(k/D1)

Reactor dispersion number (D/vL)

Reduced time (vt/V)

None of these

Thiele modulus (L√(k/D1)

Reactor dispersion number (D/vL)

Reduced time (vt/V)

None of these

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Chemical Reaction Engineering
The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

0.5

0.425

0.875

Data insufficient to calculate

0.5

0.425

0.875

Data insufficient to calculate

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Chemical Reaction Engineering
If 'n' is the order of reaction, then unit of rate constant is

None of these

1/(time)(concentration)n - 1

(time)n - 1 (concentration)

(time)-1 (concentration)n - 1

None of these

1/(time)(concentration)n - 1

(time)n - 1 (concentration)

(time)-1 (concentration)n - 1

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Chemical Reaction Engineering
For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by

A ramp function

A dirac delta function

None of these

A step function

A ramp function

A dirac delta function

None of these

A step function

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Chemical Reaction Engineering
Which of the following chemical reactions will be favoured by low pressure ?

2HI ⇋ H₂ + I₂

None of these

N₂O₂ ⇋ 2NO₂

N₂ + O₂ ⇋ 2NO

2HI ⇋ H₂ + I₂

None of these

N₂O₂ ⇋ 2NO₂

N₂ + O₂ ⇋ 2NO

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Chemical Reaction Engineering

Chemical Reaction Engineering Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Chemical Reaction Engineering The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

Chemical Reaction Engineering If 'n' is the order of reaction, then unit of rate constant is

Chemical Reaction Engineering For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by

Chemical Reaction Engineering Which of the following chemical reactions will be favoured by low pressure ?

Chemical Reaction Engineering
Which of the following is not a dimension-less group used in catalysis ? (where, D = dispersion co-efficient, cm² /sec.D1 = diffusion co-efficient; cm²/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm³/sec . V = volume, cm³.)

Chemical Reaction Engineering
The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is

Chemical Reaction Engineering
If 'n' is the order of reaction, then unit of rate constant is

Chemical Reaction Engineering
For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by

Chemical Reaction Engineering
Which of the following chemical reactions will be favoured by low pressure ?