Chromatographic Behavior of Solute

Question 1

How is the molar concentration of solute in stationary phase related to molar concentration of solute in the mobile phase?
a) Directly proportional
b) Inversely proportional
c) Equal
d) Not related

Answer 1

a) Directly proportional

Question 2

If the value of the distribution constant ‘k’ is one, then what could be inferred about the distribution of solute?
a) Its distribution in stationary phase is greater
b) Its distribution in mobile phase is greater
c) It is equally distributed in stationary and mobile phase
d) It is distributed in a random manner

Answer 2

c) It is equally distributed in stationary and mobile phase

Question 3

The time taken by the analyte after sample injection to reach the detector is called _________
a) Dead time
b) Solute migration rate
c) Adjusted retention time
d) Retention time

Answer 3

d) Retention time

Question 4

The time required for a molecule of the mobile phase to pass through the column is called ___________
a) Dead time
b) Solute migration rate
c) Adjusted retention time
d) Retention time

Answer 4

a) Dead time

Question 5

Adjusted retention time is the remaining retention time after subtracting __________ from ___________
a) Solute migration rate and retention time
b) Retention time and solute migration rate
c) Dead time and retention time
d) Retention time and dead time

Answer 5

c) Dead time and retention time

Question 6

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?
a) Dead volume
b) Retention volume
c) Void volume
d) Adjusted retention volume

Answer 6

b) Retention volume

Question 7

Adjusted retention volume is the remaining retention volume after subtracting ___________ from _____________
a) Solute migration rate and retention volume
b) Retention volume and solute migration rate
c) Dead volume and retention volume
d) Retention volume and dead volume

Answer 7

c) Dead volume and retention volume

Question 8

Which of the following is defined as the ratio of moles of solute in stationary phase to the moles of solute in the mobile phase?
a) Distribution constant
b) Volumetric phase ratio
c) Retention factor
d) Total porosity

Answer 8

a) Distribution constant

Question 9

Which of the following is the ratio of the interstitial volume of packing to the volume of its total mass?
a) Distribution constant
b) Volumetric phase ratio
c) Retention factor
d) Total porosity

Answer 9

d) Total porosity

Question 10

Which of the following is the ratio of the length of column packing to dead time?
a) Average linear rate of solute migration
b) Average linear rate of mobile migration
c) Relative migration rate
d) Selectivity factor

Answer 10

b) Average linear rate of mobile migration

Question 11

Which of the following is the ratio of a length of column packing to retention time?
a) Average linear rate of solute migration
b) Average linear rate of mobile migration
c) Relative migration rate
d) Selectivity factor

Answer 11

a) Average linear rate of solute migration

Question 12

Retention distance is the distance between point of injection and minimum peak in the recorder or computer-generated chart.
a) True
b) False

Answer 12

b) False

Question 13

Retention volume can be obtained by finding the product of which of the following parameters?
a) Dead time and total porosity
b) Retention time and volumetric flow rate
c) Adjusted retention time and volumetric flow rate
d) Retention time and total porosity.

Answer 13

b) Retention time and volumetric flow rate

Question 14

Retention factor is also known as the capacitance factor.
a) True
b) False

Answer 14

a) True

Question 15

What must be the value of the selectivity factor?
a) Equal to 1
b) Less than 1
c) Greater than 1
d) Greater than 0

Answer 15

c) Greater than 1