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Applied Chemistry 2: Applications of Spectroscopy
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Applied Chemistry 2: Applications of Spectroscopy
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25 Questions

1. If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long time, the phenomenon is termed as which of the following?
2. In X-ray fluorescence spectrometer, the relationship between the excitation intensity and the intensity of fluorescence does not depend on which of the following?
3. The measurement of intensity of fluorescent X-rays provide a simple and ____________ way of _____________ analysis.
4. Why do fluorescence spectrometers often use double-beam optics?
5. In the intersystem crossing
6. What are the appropriate reasons for the deviation from the Beer's law among the following?A Monochromaticity of light B. Very high concentration of analyte C. Association of analyte D. Dissociation of analyte
7. The fact that the fluorescence wavelength is often much longer than the irradiation wavelength (Stokes shift) is a consequence of which phenomenon?
8. Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of which of the following phenomena?
9. Why do fluorescence spectrometers often use double-beam optics?
10. Which of the following is Mosely’s equation if ‘C’ is the speed of light, ‘a’ is proportionality constant, ‘σ’ is a constant which depends on electronic transition series, ‘Z’ is the atomic number and ‘λ’ is the wavelength?
11. If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a short time, the phenomenon is termed as which of the following?
12. Which of the following are the reactions in which molecules absorbing light do not themselves react but induce other molecules to react?
13. Why phosphorescence measurements are usually made at a low temperature?
14. Which regions of the light radiations of the visible ultraviolet lying between - wavelength are chiefly concerned in bringing about photochemical reactions?
15. If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long time, the phenomenon is termed as which of the following?
16. The measurement of intensity of fluorescent X-rays provide a simple and ____________ way of _____________ analysis.
17. What are the appropriate reasons for the deviation from the Beer's law among the following?A Monochromaticity of light B. Very high concentration of analyte C. Association of analyte D. Dissociation of analyte
18. Which of the following instruments is used to measure the energy of the monochromatic radiation most accurately?
19. Which of the following will result in deviation from Beer's law? A. Change in a refractive index of medium B. Dissociation of analyte on dilution C. Polychromatic light D. Path length of cuvette
20. Which of the following instruments is used to measure the energy of the monochromatic radiation most accurately?
21. Fluorescent X-ray spectrometers would require only moderate-intensity X-ray tubes.
22. Which of the following is Mosely’s equation if ‘C’ is the speed of light, ‘a’ is proportionality constant, ‘σ’ is a constant which depends on electronic transition series, ‘Z’ is the atomic number and ‘λ’ is the wavelength?
23. If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long or a short time, the phenomenon is termed as which of the following?
24. In X-ray fluorescence spectrometer, the relationship between the excitation intensity and the intensity of fluorescence does not depend on which of the following?
25. Which of the following will result in deviation from Beer's law? A. Change in a refractive index of medium B. Dissociation of analyte on dilution C. Polychromatic light D. Path length of cuvette

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