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MCQs

Total Questions : 136 | Page 7 of 14 pages
Question 61. Using Chromatogram as detector in Chromatography, a graph is obtained between ____________ and time.
  1.    Quantity
  2.    Density
  3.    Concentration
  4.    Specific gravity
 Discuss Question
Answer: Option C. -> Concentration
Answer: (c).Concentration
Question 62. The time taken by the analyte after sample injection to reach the detector is called _________
  1.    Dead time
  2.    Solute migration rate
  3.    Adjusted retention time
  4.    Retention time
 Discuss Question
Answer: Option D. -> Retention time
Answer: (d).Retention time
Question 63. The time required for a molecule of the mobile phase to pass through the column is called ___________
  1.    Dead time
  2.    Solute migration rate
  3.    Adjusted retention time
  4.    Retention time
 Discuss Question
Answer: Option A. -> Dead time
Answer: (a).Dead time
Question 64. Which of the following is the volume of mobile phase required to make a solute band move from the point of injection through the column to the detector?
  1.    Dead volume
  2.    Retention volume
  3.    Void volume
  4.    Adjusted retention volume
 Discuss Question
Answer: Option B. -> Retention volume
Answer: (b).Retention volume
Question 65. Adjusted retention time is the remaining retention time after subtracting __________ from ___________
  1.    Solute migration rate and retention time
  2.    Retention time and solute migration rate
  3.    Dead time and retention time
  4.    Retention time and dead time
 Discuss Question
Answer: Option C. -> Dead time and retention time
Answer: (c).Dead time and retention time
Question 66. Adjusted retention volume is the remaining retention volume after subtracting ___________ from _____________
  1.    Solute migration rate and retention volume
  2.    Retention volume and solute migration rate
  3.    Dead volume and retention volume
  4.    Retention volume and dead volume
 Discuss Question
Answer: Option C. -> Dead volume and retention volume
Answer: (c).Dead volume and retention volume
Question 67. Which of the following is the expression for Eddy diffusion in the column, if ‘γ’ represents obstruction factor, ‘dₚ’ represents particle diameter, ‘Dₘ’ represents Solute diffusion co-efficient and ‘λ’ represents function for packing uniformity?
  1.    λ dₘ
  2.    2 γ Dₘ
  3.    Dₘ γ
  4.    λ/dₘ
 Discuss Question
Answer: Option A. -> λ dₘ
Answer: (a).λ dₘ
Question 68. In gas-liquid chromatography, when films are used in the interior of the capillary column, then what is the value of Eddy diffusion?
  1.    Greater than 1
  2.    Less than 1
  3.    Zero
  4.    Less than zero
 Discuss Question
Answer: Option C. -> Zero
Answer: (c).Zero
Question 69. Which of the following is the expression for longitudinal diffusion in the column, if ‘γ’ represents obstruction factor, ‘dₘ’ represents particle diameter, ‘Dₘ’ represents Solute diffusion co-efficient and ‘λ’ represents function for packing uniformity?
  1.    λ dₘ
  2.    2 γ Dₘ
  3.    Dₘ γ
  4.    λ/dₘ
 Discuss Question
Answer: Option B. -> 2 γ Dₘ
Answer: (b).2 γ Dₘ
Question 70. For an unpacked coated capillary column, the obstruction factor takes which of the following values?
  1.    0
  2.    0.6
  3.    1
  4.    1.6
 Discuss Question
Answer: Option C. -> 1
Answer: (c).1

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