Chemical Reaction Engineering MCQs

Question 1

Non-catalytic fluid-solid reactions are represented by __________ model.

Accepted Answer

Both A and B

Answer

Continuous reaction

Answer

Unreacted core

Answer

Neither A and B

Question 2

Which of the following is the most suitable for very high pressure gas phase reaction?

Accepted Answer

Tubular flow reactor

Answer

Batch reactor

Answer

Stirred tank reactor

Answer

Fluidised bed reactor

Question 3

Considering the endotheomic dissociation of CaCO3 in a closed vessel (CaCO3 ⇋ CaO + CO2), the pressure of CO2 increases, if

Accepted Answer

The temperature is increased

Answer

A catalyst is added

Answer

An inert gas is pumped keeping the temperature constant

Answer

None of these

Question 4

As the chemical reaction proceeds, the rate of reaction

Accepted Answer

Decreases

Answer

Increases

Answer

Remains same

Answer

May increase or decrease depending on the type of reaction

Question 5

Promoter . . . . . . . .

Accepted Answer

Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals

Answer

Initiates a chemical reaction and is a catalyst by itself

Answer

Atlers the position of equilibrium in a reversible reaction

Answer

All of the above

Question 6

A balanced chemical reaction equation conforms to the law of

Accepted Answer

Conservation of mass

Answer

Avagadro's hypothesis

Answer

Gaseous volumes

Answer

None ofthese

Question 7

'N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions.

Accepted Answer

Any

Answer

First

Answer

Second

Answer

Third

Question 8

In a CSTR __________ varies with time.

Accepted Answer

Neither A nor B

Answer

Reaction rate

Answer

Concentration

Answer

Both A & B

Question 9

Batch process is preferred over continuous process, when the

Accepted Answer

All of the above

Answer

Product yields and quality can not be achieved in continuous process, because of long residence time

Answer

Sales demand of product is not steady

Answer

Same equipment can not be used for several processes of the same nature