MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
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 | |
| 4. |
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 | |
| 5. |
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. | |
| 6. |
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. | |
| 7. |
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 | |
| 8. |
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. | |
| 9. |
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 H<sub>2</sub>SO<sub>4</sub>, SO<sub>3</sub>, NH<sub>3</sub>, etc |
| Answer» E. | |
| 10. |
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 | |
| 11. |
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 | |
| 12. |
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. | |