Chemical Reaction Engineering MCQs

Question 1

The rate of reaction does not decrease appreciably as the reaction proceeds in case of __________ reactions.

Accepted Answer

Autocatalytic

Answer

Exothermic

Answer

Endothermic

Answer

Autothermal

Question 2

With increase in temperature, the equilibrium __________ rises in case of endothermic reaction.

Accepted Answer

Conversion

Answer

Constant

Answer

Both A & B

Answer

Neither A nor B

Question 3

Catalyst carriers

Accepted Answer

Provide large surface area with a small amount of active material

Answer

Have very high selectivity

Answer

Increase the activity of a catalyst

Answer

Inhibit catalyst poisoning

Question 4

The use of space time is preferred over the mean residence time in the design of a/an

Accepted Answer

Ideal tubular-flow reactor

Answer

Batch reactor

Answer

Slurry reactor

Answer

CSTR

Question 5

A high space velocity means that a given

Accepted Answer

Both A and B

Answer

Reaction can be accomplished with small reactor

Answer

Conversion can be obtained with a high feed rate

Answer

None of these

Question 6

A batch reactor is characterised by

Accepted Answer

Variation in extent of reaction and properties of the reaction mixture with time

Answer

Constant residence time

Answer

Variation in reactor volume

Answer

Very low conversion

Question 7

In a continuous flow stirred tank reactor, the composition of the exit stream

Accepted Answer

Is same as that in the reactor

Answer

Is different than that in the reactor

Answer

Depends upon the flow rate of inlet stream

Answer

None of these

Question 8

Rate of a chemical reaction is not influenced by the

Accepted Answer

Number of molecules of reactants taking part in a reaction

Answer

Catalyst

Answer

Temperature

Answer

Reactants concentration

Question 9

A catalyst inhibitor

Accepted Answer

All of the above

Answer

Lessens its selectivity

Answer

May be useful for suppressing undesirable side reactions

Answer

Is added in small quantity during the catalyst manufacture itself