Chemical Reaction Engineering MCQs

Question 1

Velocity of a reaction depends upon the

Accepted Answer

All of the above

Answer

Nature of the reactants

Answer

Concentration of the reactants

Answer

Temperature at which the reaction is carried

Question 2

Inversion of cane sugar is an example of

Accepted Answer

Bimolecular reaction with first order

Answer

Unimolecular reaction with first order

Answer

Bimolecular reaction with second order

Answer

Unimolecular reaction with second order

Question 3

Most important characteristics of gas-liquid reactors are the

Accepted Answer

Both A and B

Answer

Specific inter-facial area

Answer

Liquid hold-up

Answer

None of these

Question 4

The enzyme which can catalyse the conversion of glucose to ethyl alcohol is

Accepted Answer

Zymase

Answer

Invertase

Answer

Maltase

Answer

Diastase

Question 5

The irreversible reaction is a special case of reversible reaction, if the

Accepted Answer

Reactant concentration at equilibrium condition is zero

Answer

Equilibrium constant is 1

Answer

Conversion of the reactant at equilibrium condition is zero

Answer

All of the above

Question 6

Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.

Accepted Answer

Pore diffusion

Answer

Gas film

Answer

Chemical reaction

Answer

None of these

Question 7

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.

Accepted Answer

Same as

Answer

More than

Answer

Less than

Answer

Data insufficient; can't be predicted

Question 8

A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield?

Accepted Answer

Either of the arrangement A or B will give the same yield

Answer

Large reactor followed by smaller one

Answer

Smaller reactor followed by larger one

Answer

Data insufficient, can't be predicted

Question 9

For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

Accepted Answer

τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant

Answer

τ and θ are always equal

Answer

τ = θ , when the fluid density changes in the reactor

Answer

τ = θ , for a non-isothermal reactor