Analytical Instrumentation Questions and Answers – Instrumentation of Ion Spectroscopy

This set of Analytical Instrumentation Multiple Choice Questions & Answers (MCQs) focuses on “Instrumentation of Ion Spectroscopy”.

1. In ion spectroscopy, the positive ions are focussed on the sample at which of the following angles?
a) 20^o
b) 30^o
c) 45^o
d) 90^o
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2. Only those electrons which are in a selected small solid angle are received in the ________ electrostatic analyser.
a) 100^o
b) 127^o
c) 180^o
d) 263^o
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3. 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
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4. 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
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5. Which of the following is the energy after collision with a surface atom for a scattering angle of 90^o when E_o 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_o(M₂-M₁)/(M₂+M₁)
b) E_o(M₂+M₁)/(M₂-M₁)
c) E_o(M₂×M₁)/(M₂+M₁)
d) E_o(M₂-M₁)/(M₂×M₁)
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6. It is advantageous to use ions from a variety of gases.
a) True
b) False
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7. Which of the following gases is not often used in ion spectroscopy?
a) Helium
b) Argon
c) Nitrogen
d) Neon
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8. ISS is sensitive to every element heavier than which of the following?
a) Helium
b) Hydrogen
c) Nitrogen
d) Neon
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9. Which of the following is the lightest isotope used as a primary ion?
a) He
b) ²He
c) ³He
d) ³H
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10. The specificity will vary depending on the scattering gas used.
a) True
b) False
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11. ISS is less sensitive than which of the following?
a) SIMS
b) Auger
c) ESCA
d) AES
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12. Which of the following is the detection limit of ISS for monolayer?
a) 10 ^-1 %
b) 10 ^-2 %
c) 10 ^-3 %
d) 10 ^-4 %
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13. 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
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14. 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
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15. 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
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Sanfoundry Global Education & Learning Series – Analytical Instrumentation.

To practice all areas of Analytical Instrumentation, here is complete set of 1000+ Multiple Choice Questions and Answers.

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