Q.1
Stages in the extractor are _______________
  • a) Equilibrium stages
  • b) Theoretical stages
  • c) Equilibrium or theoretical stages
  • d) None of the mentioned
Q.2
Extraction includes mixing alone.
  • a) True
  • b) False
Q.3
Every stage of extractor act as mixer and settler in the extraction process.
  • a) True
  • b) False
Q.4
If the pure solvent is used find the value of “ys” by analysing the below single stage extractor.
Questionmass-transfer-questions-answers4.jpg
  • a) 0
  • b) 1
  • c) 0-1
  • d) None of the mentioned
Q.5
Find the rate of extract in mol/hr if
  • a) 100
  • b) 125
  • c) 150
  • d) 50
Q.6
Is the extraction is possible if a gas solvent is used for extracting solute from liquid mixture.
  • a) True
  • b) False
Q.7
Find the process.
  • a) Single stage batch process
  • b) Single stage continuous process
  • c) Multistage continuous process
  • d) None of the mentioned
Q.8
Find the sum of R and E if the sum of F and S iskmol.
Questionmass-transfer-questions-answers8.jpg
  • a) 20 kmol
  • b) 40 kmol
  • c) 60 kmol
  • d) 80 kmol
Q.9
Find the pure solvent rate if the feed ( F=kmol/hr) composition is 0.and mixture solute composition is 0.5.
Questionmass-transfer-questions-answers9.jpg
  • a) 10 kmol/hr
  • b) 20 kmol/hr
  • c) 30 kmol/hr
  • d) 40 kmol/hr
Q.10
Find the mixture composition of feed and pure solvent if the ratio of solvent to feed rate is 0.5 and the feed composition is 0.5.
  • a) 0.5
  • b) 0.25
  • c) 0.33
  • d) 0.4
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