Analytical Instrumentation Practice Test 2

1. Which of the following detectors is widely used to detect environmental samples like chlorinated pesticides and polychlorinated biphenyls?

Thermal conductivity detector

Argon ionisation detector

Flame ionization detector

Electron capture detector

2. Thermionic emission detector used in gas chromatography is most sensitive to which of the following elements?

Carbon

Phosphorous

Nitrogen

Halogen

3. Which of the following is the distance that the solute moves while undergoing one partition?

Retention distance

Plate height

Distribution constant

Column packing length

4. Adjusted retention volume is the remaining retention volume after subtracting ___________ from _____________

Dead volume and retention volume

Solute migration rate and retention volume

Retention volume and dead volume

Retention volume and solute migration rate

5. Which of the following is the ratio of the interstitial volume of packing to the volume of its total mass?

Distribution constant

Total porosity

Volumetric phase ratio

Retention factor

6. How is the molar concentration of solute in stationary phase related to molar concentration of solute in the mobile phase?

Inversely proportional

Equal

Not related

Directly proportional

7. If the value of the distribution constant ‘k’ is one, then what could be inferred about the distribution of solute?

Its distribution in stationary phase is greater

It is equally distributed in stationary and mobile phase

Its distribution in mobile phase is greater

It is distributed in a random manner

8. Which of the following are the practical problems that arise due to the decrease in column diameter?

Requirement of large particle size and low pressure drop

Requirement of large particle size and high pressure drop

Requirement of small particle size and high pressure drop

Requirement of small particle size and low pressure drop

9. Retention factor is also known as the capacitance factor.

True

False

10. Which of the following will improve the efficiency of the separation process in liquid chromatography?

Increase in sample size, increase in column diameter

Reduction in sample size, increase in column diameter

Increase in sample size, reduction in column diameter

Reduction in sample size, reduction in column diameter