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Total Questions : 148 | Page 15 of 15 pages
Question 141. ESCA gives sufficient chemical information up to a depth about ________ armstrong in polymers.
  1.    5-20
  2.    15-40
  3.    40-100
  4.    100-200
 Discuss Question
Answer: Option C. -> 40-100
Answer: (c).40-100
Question 142. Discrete electrons cannot be observed in electron ionization of an atom due to which of the following reasons?
  1.    Environmental disturbances
  2.    Same mass
  3.    Same charge
  4.    Electron- electron interaction
 Discuss Question
Answer: Option D. -> Electron- electron interaction
Answer: (d).Electron- electron interaction
Question 143. ESCA focusses on which of the following information?
  1.    Mass of the electron
  2.    Charge of the electron
  3.    Binding energy of the electron
  4.    Mass of atoms
 Discuss Question
Answer: Option C. -> Binding energy of the electron
Answer: (c).Binding energy of the electron
Question 144. In Auger spectroscopy, beam currents are typically _____ in a beam of diameter 0.5mm.
  1.    5-10 µA
  2.    5-20 µA
  3.    5-30 µA
  4.    5-50 µA
 Discuss Question
Answer: Option D. -> 5-50 µA
Answer: (d).5-50 µA
Question 145. Which of the following is the detection limit of Auger Electron Spectroscopy?
  1.    0.1% monolayer
  2.    0.5% monolayer
  3.    1% monolayer
  4.    2% monolayer
 Discuss Question
Answer: Option B. -> 0.5% monolayer
Answer: (b).0.5% monolayer
Question 146. AES is more sensitive than XPS because of which of the following factors?
  1.    Binding energies of electrons
  2.    Kinetic energies of electrons
  3.    Mass of electrons
  4.    Mass to charge ratio of electrons
 Discuss Question
Answer: Option B. -> Kinetic energies of electrons
Answer: (b).Kinetic energies of electrons
Question 147. Which of the following denotes the sample destruction that occurs in Auger electron spectroscopy?
  1.    None in 95% of sample
  2.    None in 99% of sample
  3.    None in 100% of sample
  4.    Frequent
 Discuss Question
Answer: Option D. -> Frequent
Answer: (d).Frequent
Question 148. How is the specificity of Auger electron spectroscopy?
  1.    Very bad
  2.    Bad
  3.    Good
  4.    Very good
 Discuss Question
Answer: Option C. -> Good
Answer: (c).Good

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