MCQOPTIONS
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MCQOPTIONS
This section includes 17 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, ‘σ’ is a constant which depends on electronic transition series, ‘Z’ is the atomic number and ‘λ’ is the wavelength? |
| A. | Cλ= a(Z-σ)2 |
| B. | C/λ= a(Z-σ)2 |
| C. | C(Z-σ)2= aλ |
| D. | C(Z-σ)2= a/λ |
| Answer» C. C(Z-σ)2= aλ | |
| 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 | |
| 9. |
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. | |
| 10. |
Fluorescent_X-ray_spectrometers_would_require_only_moderate-intensity_X-ray_tubes.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
The problem of spectral interference is not severe in X-ray spectroscopy? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
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?$ |
| A. | Cλ= a(Z-σ)<sup>2</sup> |
| B. | C/λ= a(Z-σ)<sup>2</sup> |
| C. | C(Z-σ)<sup>2</sup>= aλ |
| D. | C(Z-σ)<sup>2</sup>= a/λ |
| Answer» C. C(Z-‚âà√¨‚àö√¢)<sup>2</sup>= a‚âà√≠¬¨‚Ñ¢ | |
| 13. |
The energy of the emitted X-rays depends upon the _________ of the atom and their intensity depends upon the __________ |
| A. | Atomic number, amount of sample |
| B. | Mass number, amount of sample |
| C. | Mass number, concentration of atoms |
| D. | Atomic number, concentration of atoms |
| Answer» E. | |
| 14. |
The measurement of intensity of fluorescent X-rays provide a simple and ____________ way of _____________ analysis. Fill in the blanks. |
| A. | Destructive, quantitative |
| B. | Non-destructive, quantitative |
| C. | Destructive, qualitative |
| D. | Non-destructive, qualitative |
| Answer» C. Destructive, qualitative | |
| 15. |
Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of which of the following phenomena? |
| A. | Luminescence |
| B. | Fluorescence |
| C. | Phosphorescence |
| D. | Spontaneous emission |
| Answer» C. Phosphorescence | |
| 16. |
If the absorption of electromagnetic radiation by matter results in the emission of radiation of 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 | |
| 17. |
If the absorption of electromagnetic radiation by matter results in the emission of radiation of 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 | |