Engineering Questions with Answers - Multiple Choice Questions
Separation Processes MCQ’s – Reactive Distillation
1 - Question
What does reactive distillation denote?
a) Distillation after reaction
b) Reaction after distillation
c) Reaction along with distillation
d) Automatic distillation by reaction
Explanation: Reactive distillation denotes simultaneous reaction and distillation.
2 - Question
What are similar to reactive entrainers?
a) Reactive absorbents
b) Reactive adsorbents
c) Reactive sublimers
d) Reactive evaporators
Explanation: Reactive absorbents are similar to reactive entrainers and they are widely practiced.
3 - Question
What is meant by sweetening of natural gas?
a) Removal of H2S
b) Removal of H2O and CO2
c) Removal of H2S and CO2
d) Removal of H2O and CO
Explanation: Sweetening of natural gas means removal of H2S and CO2 by addition of reactive absorbents.
4 - Question
What reactive absorents are added for sweetening of natural gas?
a) Triethanol amines
b) Ethyl alchol
c) Monoethanol amine
Explanation: Monoethanol amine is added for the removal of H2S and CO2 that sweetens the natural gas.
5 - Question
Reactive distillation is carried out when the reaction occurs in:
a) Solid phase
b) Gaseous phase
c) Solid or gaseous phase
d) Liquid phase
Explanation: Reactive distillation is carried out only when the reaction occurs in liquid phase in presence or absence of homogeneous catalyst.
6 - Question
What is the relation between reaction rate and distillation rate for reactive distillation?
a) Reaction rate is more
b) Distillation rate is more
c) It depends on the components
d) Both are equal
Explanation: The feasible temperature for the reaction and distillation are the same. Hence the reaction rate and distillation rates are same.
7 - Question
Why a large reactant excess not required for high conversion?
a) Because conversion is very high already
b) Conversion is driven by temperature
c) Conversion is driven by pressure
d) If one or more products can be distilled out, there is a high conversion
Explanation: If one or more products can be distilled out then the reaction proceeds to completion. Hence a large reactant excess is not required.
8 - Question
Which of the following is an application of reactive distillation?
a) Avoiding undesirable reactions
b) Avoiding temperature rise
c) Separation of gases
d) Separation of solids
Explanation: Avoiding undesirable reactions is an application of reactive distillation.
9 - Question
Which of the following is not a commercial application of reactive distillation?
a) Esterification of acetic acid with ethanol
b) Reaction of formaldehyde and methanol
c) Reaction of isobutene and methanol
d) Oxidation of ethyl alcohol
Explanation: Since oxidation of alcohols involves gaseous phase, it cannot be used for reactive distillation.
10 - Question
For the reaction A R where A is more volatile, why does it require close examination?
a) Reaction is very exothermic
b) Reverse reaction may occur when equilibrium is reached
c) Reaction cannot occur if a certain barrier of temperature is crossed
d) Reaction may not occur if the reactants get mixed
Explanation: At a certain point in the column, equilibrium may be attained. If the reaction is allowed to carry on further the reverse reaction may take place. Hence a close examination is required.