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. |
Which of the following is not a reason for laser not being generally used as a source of radiation for UV, Visible Spectroscopy? |
| A. | High cost |
| B. | Limited range of wavelength |
| C. | Less intensity |
| D. | Complex to work with |
| Answer» D. Complex to work with | |
| 2. |
How is Tungsten Halogen lamp differs from normal Tungsten filament lamp used in absorption spectroscopy? |
| A. | It has a tungsten filament and is filled with inert gas |
| B. | Iodine is added to normal filling gas |
| C. | Iodine is coated on tungsten filament |
| D. | Iodine is added to inert gas |
| Answer» C. Iodine is coated on tungsten filament | |
| 3. |
Which is the missing block in the block diagram for Absorption of Radiation Instrument given below? |
| A. | Filter |
| B. | Reflector |
| C. | Converging lens |
| D. | Detector |
| Answer» E. | |
| 4. |
WHICH_OF_THE_FOLLOWING_IS_NOT_A_REASON_FOR_LASER_NOT_BEING_GENERALLY_USED_AS_A_SOURCE_OF_RADIATION_FOR_UV,_VISIBLE_SPECTROSCOPY??$ |
| A. | High cost |
| B. | Limited range of wavelength |
| C. | Less intensity |
| D. | Complex to work with |
| Answer» D. Complex to work with | |
| 5. |
To tolerate high operating temperatures, which of the following has to be done in incandescent or tungsten filament lamps? |
| A. | Alloys must be used |
| B. | Nitrogen be used instead of inert gas |
| C. | Envelope is fabricated with quartz |
| D. | Envelope is fabricated with copper |
| Answer» D. Envelope is fabricated with copper | |
| 6. |
How can stability of radiation be achieved in incandescent or discharge source used in Absorption Spectroscopy? |
| A. | Using filters |
| B. | Using monochromators |
| C. | Using slits |
| D. | By controlling the source voltage |
| Answer» E. | |
| 7. |
Which of the following could be used as the layer of dielectric in interference filters used in Absorption Spectroscopy? |
| A. | Graphite |
| B. | MgF<sub>2</sub> |
| C. | Fe |
| D. | AgNO<sub>3</sub> |
| Answer» C. Fe | |
| 8. |
How does continuous wedge filter differ from normal interference filter used in absorption spectroscopy? |
| A. | It permits continuous selection of different wavelength |
| B. | It allows narrow band of wavelengths to pass |
| C. | It has two semi-transparent layers of silver |
| D. | Space layer is made of a substance having low refractive index |
| Answer» B. It allows narrow band of wavelengths to pass | |
| 9. |
Instead of glass filters, why gelatin filters could not be used for a long period while both are Absorption filters? |
| A. | Gelatin tends to evaporate and hence they deteriorate |
| B. | Gelatin is affected by humidity in environment |
| C. | They deteriorate due to absorption of heat leading to changes in gelatin |
| D. | Gelation is affected by temperature in environment |
| Answer» D. Gelation is affected by temperature in environment | |
| 10. |
How is Tungsten Halogen lamp differ from normal Tungsten filament lamp used in absorption spectroscopy? |
| A. | It has a tungsten filament and is filled with inert gas |
| B. | Iodine is added to normal filling gas |
| C. | Iodine is coated on tungsten filament |
| D. | Iodine is added to inert gas |
| Answer» C. Iodine is coated on tungsten filament | |
| 11. |
Which of the following detectors is used to detect light intensities which are very weak? |
| A. | Photomultiplier tube |
| B. | Photovoltaic cell |
| C. | Photoemissive tubes |
| D. | Photo reflector |
| Answer» B. Photovoltaic cell | |
| 12. |
Which of the following detectors does not require a battery and is also known as barrier layer cell? |
| A. | Photomultiplier tube |
| B. | Photovoltaic cell |
| C. | Photoemissive tubes |
| D. | Photo reflector |
| Answer» C. Photoemissive tubes | |