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MCQs

Total Questions : 62 | Page 3 of 7 pages
Question 21. For the extractions operation, the selectivity should be
  1.    > 1
  2.    < 1
  3.    1
  4.    zero
 Discuss Question
Answer: Option A. -> > 1
Answer: (a).> 1
Question 22. The purity of a solute collected between two times t1 and t2 during chromatographic separation can be calculated as
  1.    amount of solute eluted - amount of impurity eluted
  2.    amount of solute eluted / amount of impurity eluted
  3.    amount of solvent eluted + amount of impurity eluted
  4.    amount of solvent eluted / amount of impurity eluted
 Discuss Question
Answer: Option B. -> amount of solute eluted / amount of impurity eluted
Answer: (b).amount of solute eluted / amount of impurity eluted
Question 23. A typical tubular centrifuge has a bowl of 2 to 5 inch in diameter and 9 to 30 inch in height with a maximum rotating speed of
  1.    15,000 to 50,000 rpm
  2.    50,000 to 100,000 rpm
  3.    100,000 to 150,000 rpm
  4.    150,000 to 200,000 rpm
 Discuss Question
Answer: Option A. -> 15,000 to 50,000 rpm
Answer: (a).15,000 to 50,000 rpm
Question 24. Chromatography is based on the
  1.    different rate of movement of the solute in the column
  2.    separation of one solute from other constituents by being captured on the adsorbent
  3.    different rate of movement of the solvent in the column
  4.    any of the above
 Discuss Question
Answer: Option A. -> different rate of movement of the solute in the column
Answer: (a).different rate of movement of the solute in the column
Question 25. The correlation often employed to correlate adsorption data for protein is (where Ymax is the maximum amount of solute adsorbed per mass of adsorbent, X is the mass fraction of solute in the diluent phase in solute-free basis, KL is a constant and Y is the equilibrium value of the mass of solute adsorbed per mass of adsorbent)
  1.    Y = YmaxX/(KL+X)
  2.    Y = Ymax/(KL+X)
  3.    Y = YmaxX/KL
  4.    Y = Ymax- X/ (KL+X)
 Discuss Question
Answer: Option A. -> Y = YmaxX/(KL+X)
Answer: (a).Y = YmaxX/(KL+X)
Question 26. An ion exchange resin is composed of
  1.    polymeric network
  2.    ionic functional groups
  3.    counter ions
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 27. Concentration polarization can be reduced further by
  1.    pre filtering the solution
  2.    reducing the flow rate per unit membrane surface area
  3.    back washing periodically
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above
Question 28. The efficiency of cell disruption in a bead mill depends on the
  1.    concentration of the cells
  2.    amount and size of beads
  3.    type and rotational speed of agitation
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 29. A common filter medium is the cloth filter generally made of
  1.    canvas
  2.    synthetic fabrics
  3.    metal or glass fiber
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 30. A system which require less solvent and produces a more concentrated extract phase, is desired with a
  1.    large distribution coefficients
  2.    small distribution coefficients
  3.    very small distribution coefficients
  4.    constant distribution coefficients
 Discuss Question
Answer: Option A. -> large distribution coefficients
Answer: (a).large distribution coefficients

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