1. If the value of ϕ is 20 by lever rule and reflux is 6000mol/hr what is distillate rate?
a) 300mol/hr
b) 30mol/hr
c) 400mol/hr
d) 40mol/hr
Explanation: ϕ= reflux flow/distillate flow ,hence distillate flow = reflux flow/ ϕ = 6000/200= 300.
2. If the value of ϕ is 20 by lever rule and reflux is 8000mol/hr what is distillate rate?
a) 300mol/hr
b) 30mol/hr
c) 400mol/hr
d) 40mol/hr
Explanation: ϕ= reflux flow/distillate flow ,hence distillate flow = reflux flow/ ϕ = 8000/200= 400.
3. If the value of ϕ is 20 by lever rule and reflux is 2000mol/hr what is distillate rate?
a) 100mol/hr
b) 30mol/hr
c) 400mol/hr
d) 40mol/hr
Explanation: ϕ= reflux flow/distillate flow ,hence distillate flow = reflux flow/ ϕ = 2000/20= 100.
4. 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.
5. 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.
6. What reactive absorents are added for sweetening of natural gas?
a) Triethanol amines
b) Ethyl alchol
c) Monoethanol amine
d) Ethanol
Explanation:Monoethanol amine is added for the removal of H2S and CO2 that sweetens the natural gas.
7. 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.
8. 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.
9. 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.
10. 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.