MCQOPTIONS
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MCQOPTIONS
This section includes 20 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 the detection limit of ISS for monolayer? |
| A. | 10 -1 % |
| B. | 10 -2 % |
| C. | 10 -3 % |
| D. | 10 -4 % |
| Answer» D. 10 -4 % | |
| 2. |
ISS is less sensitive than which of the following? |
| A. | SIMS |
| B. | Auger |
| C. | ESCA |
| D. | AES |
| Answer» B. Auger | |
| 3. |
The specificity will vary depending on the scattering gas used. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which of the following is the lightest isotope used as a primary ion? |
| A. | He |
| B. | 2He |
| C. | 3He |
| D. | 3H |
| Answer» D. 3H | |
| 5. |
Which of the following is the energy after collision with a surface atom for a scattering angle of 90o when Eo is the energy of the incident ion, M1 is the mass of the incident ion and M2 is the mass of the target surface? |
| A. | Eo(M2-M1)/(M2+M1) |
| B. | Eo(M2+M1)/(M2-M1) |
| C. | Eo(M2×M1)/(M2+M1) |
| D. | Eo(M2-M1)/(M2×M1) |
| Answer» B. Eo(M2+M1)/(M2-M1) | |
| 6. |
WHICH_OF_THE_FOLLOWING_IS_THE_LIGHTEST_ISOTOPE_USED_AS_A_PRIMARY_ION??$ |
| A. | He |
| B. | <sup>2</sup>He |
| C. | <sup>3</sup>He |
| D. | <sup>3</sup>H |
| Answer» D. <sup>3</sup>H | |
| 7. |
ISS is less sensitive than which of the following?$ |
| A. | SIMS |
| B. | Auger |
| C. | ESCA |
| D. | AES |
| Answer» B. Auger | |
| 8. |
The_specificity_will_vary_depending_on_the_scattering_gas_used.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Which of the following is the resolution of quadrupole mass spectrometer used in SIMS? |
| A. | 1 amu |
| B. | 2 amu |
| C. | 5 amu |
| D. | 3 amu |
| Answer» B. 2 amu | |
| 10. |
Which of the following is the range of quadrupole mass spectrometer used in SIMS? |
| A. | 100-200 amu |
| B. | 200-300 amu |
| C. | 500-1000 amu |
| D. | 200-500 amu |
| Answer» D. 200-500 amu | |
| 11. |
After passing through the pre-filter, ions are passed through which of the following? |
| A. | Quadrupole mass spectrometer |
| B. | Time of flight mass spectrometer |
| C. | Radiofrequency mass spectrometer |
| D. | Magnetic deflection mass spectrometer |
| Answer» B. Time of flight mass spectrometer | |
| 12. |
Which_of_the_following_is_the_detection_limit_of_ISS_for_monolayer? |
| A. | 10 <sup>-1</sup> % |
| B. | 10 <sup>-2</sup> % |
| C. | 10 <sup>-3</sup> % |
| D. | 10 <sup>-4</sup> % |
| Answer» D. 10 <sup>-4</sup> % | |
| 13. |
ISS is sensitive to every element heavier than which of the following? |
| A. | Helium |
| B. | Hydrogen |
| C. | Nitrogen |
| D. | Neon |
| Answer» B. Hydrogen | |
| 14. |
Which of the following gases is not often used in ion spectroscopy? |
| A. | Helium |
| B. | Argon |
| C. | Nitrogen |
| D. | Neon |
| Answer» D. Neon | |
| 15. |
It is advantageous to use ions from a variety of gases. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
Which of the following is the energy after collision with a surface atom for a scattering angle of 90o when Eo is the energy of the incident ion, M1 is the mass of the incident ion and M2 is the mass of the target surface? |
| A. | E<sub>o</sub>(M<sub>2</sub>-M<sub>1</sub>)/(M<sub>2</sub>+M<sub>1</sub>) |
| B. | E<sub>o</sub>(M<sub>2</sub>+M<sub>1</sub>)/(M<sub>2</sub>-M<sub>1</sub>) |
| C. | E<sub>o</sub>(M<sub>2</sub>√óM<sub>1</sub>)/(M<sub>2</sub>+M<sub>1</sub>) |
| D. | E<sub>o</sub>(M<sub>2</sub>-M<sub>1</sub>)/(M<sub>2</sub>√óM<sub>1</sub>) |
| Answer» B. E<sub>o</sub>(M<sub>2</sub>+M<sub>1</sub>)/(M<sub>2</sub>-M<sub>1</sub>) | |
| 17. |
In order to obtain ISS spectra, the backscattered primary ions are sampled by which of the following? |
| A. | Faraday cup analyser |
| B. | Photographic analyser |
| C. | Micro-channel analyser |
| D. | Cylindrical mirror analyser |
| Answer» E. | |
| 18. |
Which of the following can be used as the detector in ion spectroscopy? |
| A. | Faraday cup collector |
| B. | Channel electron multiplier |
| C. | Micro-channel plate |
| D. | Flame ionization detector |
| Answer» C. Micro-channel plate | |
| 19. |
Only those electrons which are in a selected small solid angle are received in the ________ electrostatic analyser. |
| A. | 100<sup>o</sup> |
| B. | 127<sup>o</sup> |
| C. | 180<sup>o</sup> |
| D. | 263<sup>o</sup> |
| Answer» C. 180<sup>o</sup> | |
| 20. |
In ion spectroscopy, the positive ions are focussed on the sample at which of the following angles? |
| A. | 20<sup>o</sup> |
| B. | 30<sup>o</sup> |
| C. | 45<sup>o</sup> |
| D. | 90<sup>o</sup> |
| Answer» D. 90<sup>o</sup> | |