MCQOPTIONS
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MCQOPTIONS
This section includes 26 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. |
In the conductivitimetric method, to measure the conductivity of the cell, 5V ___________ is applied across the electrodes. |
| A. | DC |
| B. | AC |
| C. | Pulsating DC |
| D. | DC or AC |
| Answer» C. Pulsating DC | |
| 2. |
In conductivitimetric method, the concentration of sulphur dioxide is proportional to which of the following parameters of the saw-tooth waveform? |
| A. | Average voltage |
| B. | Peak voltage |
| C. | Slope |
| D. | RMS voltage |
| Answer» D. RMS voltage | |
| 3. |
Given below, is the diagram of Ultraviolet Fluorescence method. Identify the unmarked component. |
| A. | Filter |
| B. | Electronic circuit |
| C. | Supply |
| D. | Fluorescence chamber |
| Answer» E. | |
| 4. |
Which of the following is the wavelength of the radiation generated when an air stream containing sulphur dioxide is burned in a hydrogen-rich flame? |
| A. | 243 nm |
| B. | 394 nm |
| C. | 467 nm |
| D. | 516 nm |
| Answer» C. 467 nm | |
| 5. |
Which of the following methods are not used for the measurement of sulphur dioxide? |
| A. | Colorimetric method |
| B. | Correlation spectroscopy |
| C. | Paramagnetic analyzers |
| D. | Flame-photometry |
| Answer» D. Flame-photometry | |
| 6. |
Sensitivity to total sulphur by Flame-photometric detector is which of the following levels? |
| A. | 0.1 ppm |
| B. | 1 ppm |
| C. | 2 ppm |
| D. | 0.01 ppm |
| Answer» E. | |
| 7. |
Which of the following is the detection limit of the coulometric method used for measurement of sulphur dioxide? |
| A. | 0.1 ppm |
| B. | 1 ppm |
| C. | 2 ppm |
| D. | 0.01 ppm |
| Answer» E. | |
| 8. |
Which of the following materials are used as electrodes in the coulometric method for the measurement of sulphur dioxide? |
| A. | Gold |
| B. | Silver |
| C. | Platinum |
| D. | Nickel |
| Answer» D. Nickel | |
| 9. |
Which of the following is not true about using gas chromatography for measuring pollutants in the air? |
| A. | Pollutants react rapidly in the column |
| B. | Pollutants may not be detected by the detectors |
| C. | Special column and support materials are required |
| D. | Pollutants may elude rapidly from the column |
| Answer» E. | |
| 10. |
Which of the following are not the characteristics of colorimetry method used to monitor sulphur dioxide? |
| A. | It is simple |
| B. | It has high sensitivity |
| C. | It has good specificity |
| D. | It is affected by interference from H2SO4, SO3, NH3, etc |
| Answer» E. | |
| 11. |
Which of the following are not the characteristics of conductivitimetry method used to measure sulphur dioxide? |
| A. | Fast response |
| B. | High sensitivity |
| C. | Free from interference by other gases |
| D. | Good accuracy |
| Answer» D. Good accuracy | |
| 12. |
The conductivitimetry method, involves bubbling sulphur dioxide through a solution containing sulphuric acid and which of the following? |
| A. | Water |
| B. | Hydrogen peroxide |
| C. | Iodine |
| D. | Formaldehyde |
| Answer» C. Iodine | |
| 13. |
In West-Gaeke colourimetric procedure, the intensity of the red purple colour is measured photometically and it is proportional to the concentration of sulphur dioxide. What is the red purple coloured compound? |
| A. | Sodium tetra chloromercurate |
| B. | Dicholorosulphitomercurate complex |
| C. | Ammonia molybdate |
| D. | Paraosaniline sulphonic acid |
| Answer» E. | |
| 14. |
SENSITIVITY_TO_TOTAL_SULPHUR_BY_FLAME-PHOTOMETRIC_DETECTOR_IS_WHICH_OF_THE_FOLLOWING_LEVELS??$ |
| A. | 0.1 ppm |
| B. | 1 ppm |
| C. | 2 ppm |
| D. | 0.01 ppm |
| Answer» E. | |
| 15. |
Which of the following is the wavelength of the radiation generated when an air stream containing sulphur di-oxide is burned in a hydrogen-rich flame?$ |
| A. | 243 nm |
| B. | 394 nm |
| C. | 467 nm |
| D. | 516 nm |
| Answer» C. 467 nm | |
| 16. |
Which_of_the_following_methods_are_not_used_for_the_measurement_of_sulphur_di-oxide?$ |
| A. | Colorimetric method |
| B. | Correlation spectroscopy |
| C. | Paramagnetic analyzers |
| D. | Flame-photometry |
| Answer» D. Flame-photometry | |
| 17. |
The response of coulometric method is instantaneous. |
| A. | True |
| B. | False |
| Answer» C. | |
| 18. |
In conductivitimetric method, to measure the conductivity of the cell, 5V ___________ is applied across the electrodes. |
| A. | DC |
| B. | AC |
| C. | Pulsating DC |
| D. | DC or AC |
| Answer» C. Pulsating DC | |
| 19. |
In conductivitimetric method, the concentration of sulphur di-oxide is proportional to which of the following parameters of the saw-tooth waveform? |
| A. | Average voltage |
| B. | Peak voltage |
| C. | Slope |
| D. | RMS voltage |
| Answer» D. RMS voltage | |
| 20. |
Which of the following is the detection limit of coulometric method used for measurement of sulphur di-oxide? |
| A. | 0.1 ppm |
| B. | 1 ppm |
| C. | 2 ppm |
| D. | 0.01 ppm |
| Answer» E. | |
| 21. |
Which of the following materials are used as electrodes in coulometric method for the measurement of sulphur di-oxide? |
| A. | Gold |
| B. | Silver |
| C. | Platinum |
| D. | Nickel |
| Answer» D. Nickel | |
| 22. |
The ability of sulphur dioxide to reduce iodine is used in which of the following methods? |
| A. | Colorimetry |
| B. | Conductivitimetry |
| C. | Coulometry |
| D. | Gas chromatography |
| Answer» D. Gas chromatography | |
| 23. |
Which of the following is not true about using gas chromatography for measuring pollutants in air? |
| A. | Pollutants react rapidly in the column |
| B. | Pollutants may not be detected by the detectors |
| C. | Special column and support materials are required |
| D. | Pollutants may elude rapidly from the column |
| Answer» E. | |
| 24. |
Which of the following are not the characteristics of conductivitimetry method used to measure sulphur di-oxide? |
| A. | Fast response |
| B. | High sensitivity |
| C. | Free from interference by other gases |
| D. | Good accuracy |
| Answer» D. Good accuracy | |
| 25. |
The conductivitimetry method, involves bubbling sulphur di-oxide through a solution containing sulphuric acid and which of the following? |
| A. | Water |
| B. | Hydrogen peroxide |
| C. | Iodine |
| D. | Formaldehyde |
| Answer» C. Iodine | |
| 26. |
In West-Gaeke colourimetric procedure, the intensity of the red purple colour is measured photometically and it is proportional to the concentration of sulphur di-oxide. What is the red purple coloured compound? |
| A. | Sodium tetra chloromercurate |
| B. | Dicholorosulphitomercurate complex |
| C. | Ammonia molybdate |
| D. | Paraosaniline sulphonic acid |
| Answer» B. Dicholorosulphitomercurate complex | |