MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Analytical Instrumentation knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Polarographic cells used for measuring the partial pressure of oxygen are temperature-sensitive. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Polarographic cells are used to measure the partial pressure of gases only in static gas monitoring systems and not in continuous streams. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
In polarographic cell when potential is applied, oxygen is reduced at __________ when KCl is present. |
| A. | Anode |
| B. | Cathode |
| C. | Electrolyte |
| D. | Both the electrode |
| Answer» C. Electrolyte | |
| 4. |
Polarographic cells are not sensitive to which of the following gases? |
| A. | Carbon monoxide |
| B. | Carbon dioxide |
| C. | Nitrous oxide |
| D. | Oxygen |
| Answer» B. Carbon dioxide | |
| 5. |
Conductometric method is not very suitable for measuring traces of which of the following gases in ppb range? |
| A. | H<sub>2</sub>S |
| B. | SO<sub>2</sub> |
| C. | NH<sub>3</sub> |
| D. | CO |
| Answer» E. | |
| 6. |
In the conductometric method, the difference in gas conductivity before and after passing sample gas denotes which of the following? |
| A. | Efficiency of the cell |
| B. | Quantity of reagent |
| C. | Concentration of gas |
| D. | Density of the reagent |
| Answer» D. Density of the reagent | |
| 7. |
Which of the following methods, is the widely used method for trace gas analysis? |
| A. | Galvanic methods |
| B. | Conductometric method |
| C. | Polarographic cells |
| D. | Thermal conductivity method |
| Answer» C. Polarographic cells | |
| 8. |
Polarographic cells type of electrochemical method uses which of the following concepts? |
| A. | Cyclic reactions |
| B. | Exothermic reactions |
| C. | Reversible reactions |
| D. | Redox reactions |
| Answer» E. | |
| 9. |
Which of the following is true about Hersch cell which is one of the arrangements of a galvanic cell? |
| A. | Cell is spherical in shape |
| B. | Cathode is made of porous material |
| C. | Cathode is placed centrally |
| D. | Cathode is formed by gauze which surrounds the anode |
| Answer» E. | |
| 10. |
Which of the following is not true about the galvanic method of oxygen analysis? |
| A. | Electrodes are composed of noble and base metals |
| B. | It can measure dissolved content of oxygen |
| C. | Its principle is based on electrolysis |
| D. | It utilizes an electronic cell |
| Answer» D. It utilizes an electronic cell | |