Chemical Reaction Engineering MCQs

Question 1

Design of heterogeous catalytic reactor involves consideration of __________ steps.

Accepted Answer

Both A & B

Answer

Only chemical

Answer

Only physical

Answer

Neither A nor B

Question 2

Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction.

Accepted Answer

Consecutive

Answer

Elementary

Answer

Parallel

Answer

None of these

Question 3

Which of the following factors control the design of a fluid-solid reactor?

Accepted Answer

All of the above

Answer

Reaction kinetics for single particle,

Answer

Size distribution of solids beingtreated

Answer

Flow patterns of solids and fluid in the reactor

Question 4

Pick out the wrong statement.

Accepted Answer

When the reaction rate is independent of temperature, the reaction is said to be of zero order

Answer

The integral method of analysing kinetic data is used when the data is scattered

Answer

The differential method of analysing kinetic data requires more accurate or larger amounts of data

Answer

The ratio of volumes of plug flow reactor to that of mixed reactor is always less than one for identical feed composition, flow rate, conversion and for all positive reaction orders

Question 5

For the reversible reaction A ⇋ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium?

Accepted Answer

0.338

Answer

0.253

Answer

0.152

Answer

0.637

Question 6

The importance of diffusion in a catalyst are increased by

Accepted Answer

All of the above

Answer

Large catalyst particle size

Answer

An active surface of the catalyst

Answer

Small pore diameter

Question 7

In a semi-batch reactor

Accepted Answer

Velocity of reaction can be controlled

Answer

Maximum conversion can be controlled

Answer

Both the reactants flow counter-currently

Answer

Residence time is constant

Question 8

In autocatalytic reactions,

Accepted Answer

One of the products acts as a catalyst

Answer

One of the reactants acts as a catalyst

Answer

Catalysts have very high selectivity

Answer

No catalyst is used

Question 9

In case of a P.F.R., there

Accepted Answer

Both A and B

Answer

May be lateral mixing of fluid

Answer

Should not be any mixing along the flow path

Answer

Neither A nor B