CHEMICAL REACTION ENGINEERING QUIZ

Limiting reactant in a chemical reaction decides the

Reaction speed

Conversion

Rate constant

Equilibrium constant

TRUE ANSWER : ?
YOUR ANSWER : ?

In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be __________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume.

Data insufficient; can't be predicted

More than

Less than

Same as

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YOUR ANSWER : ?

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

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YOUR ANSWER : ?

The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CAn, then what is the value of n for this reaction?

1

0.5

2

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YOUR ANSWER : ?

In a reversible reaction, a catalyst increases the rate of forward reaction

And decreases that of the backward reaction

To a greater extent than that of the backward reaction

Only

And the backward reaction equally

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The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is

1

> 1

∞

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YOUR ANSWER : ?

Which of the following is not a chemical step in a fluid solid catalytic reaction?

Surface chemical reaction

None of these

Desorption

Adsorption

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YOUR ANSWER : ?

Carrier in a catalyst increases its

Performance

Surface area

Activity

None of these

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YOUR ANSWER : ?

For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.

Neither A nor B

Physical

Chemical

Both A and B

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For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the

Catalyst size is reduced or the catalyst diffusivity is increased

Catalyst size is increased or the catalyst diffusivity is reduced

Catalyst size is reduced or the catalyst diffusivity is reduced

Catalyst size is increased or the catalyst diffusivity is increased

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YOUR ANSWER : ?