Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

Chemical Reaction Engineering
Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

2

3

1

0

2

3

1

0

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Chemical Reaction Engineering
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.

Greater than

Equal to

Unpredictable from the data

Smaller than

Greater than

Equal to

Unpredictable from the data

Smaller than

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Chemical Reaction Engineering
For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

1

0.1

0.5

1

0.1

0.5

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Chemical Reaction Engineering
Autocatalytic reactions are best carried out in a

Recycle reactor

CSTR

Plug flow reactor

CSTR in series

Recycle reactor

CSTR

Plug flow reactor

CSTR in series

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Chemical Reaction Engineering
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

More than

Less than

Either B or C

Equal to

More than

Less than

Either B or C

Equal to

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Chemical Reaction Engineering
The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)

L√(K/D1)

∞

1

1/(L√(K/D1))

L√(K/D1)

∞

1

1/(L√(K/D1))

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Chemical Reaction Engineering

Chemical Reaction Engineering The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.

Chemical Reaction Engineering For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

Chemical Reaction Engineering Autocatalytic reactions are best carried out in a

Chemical Reaction Engineering The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

Chemical Reaction Engineering The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)

Chemical Reaction Engineering
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.

Chemical Reaction Engineering
For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

Chemical Reaction Engineering
Autocatalytic reactions are best carried out in a

Chemical Reaction Engineering
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.

Chemical Reaction Engineering
The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)