MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
Fluorescent X-ray spectrometers would require only moderate-intensity X-ray tubes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 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? |
| A. | Spectrum of the incident radiation |
| B. | Angle of radiance |
| C. | Molecular weight |
| D. | Incident angle |
| Answer» E. | |
| 3. |
The problem of spectral interference is not severe in X-ray spectroscopy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which of the following is Mosely s equation if C is the speed of light, a is proportionality constant, is a constant which depends on electronic transition series, Z is the atomic number and is the wavelength? |
| A. | C = a(Z- )<sup>2</sup> |
| B. | C/ = a(Z- )<sup>2</sup> |
| C. | C(Z- )<sup>2</sup>= a |
| D. | C(Z- )<sup>2</sup>= a/ |
| Answer» C. C(Z- )<sup>2</sup>= a | |
| 5. |
The measurement of intensity of fluorescent X-rays provide a simple and ____________ way of _____________ analysis. |
| A. | Destructive, quantitative |
| B. | Non-destructive, quantitative |
| C. | Destructive, qualitative |
| D. | Non-destructive, qualitative |
| Answer» C. Destructive, qualitative | |
| 6. |
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? |
| A. | Luminescence |
| B. | Fluorescence |
| C. | Phosphorescence |
| D. | Spontaneous emission |
| Answer» D. Spontaneous emission | |
| 7. |
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? |
| A. | Luminescence |
| B. | Fluorescence |
| C. | Phosphorescence |
| D. | Spontaneous emission |
| Answer» C. Phosphorescence | |
| 8. |
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? |
| A. | Luminescence |
| B. | Fluorescence |
| C. | Phosphorescence |
| D. | Spontaneous emission |
| Answer» B. Fluorescence | |