Applications of Spectroscopy Quiz
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Questions and Answers

Which of the following is one of the main types of Atomic Spectroscopy used for determining the elemental composition of substances?

  • Atomic Emission Spectroscopy (correct)
  • Atomic Absorption Spectroscopy
  • Atomic Scattering Spectroscopy
  • Atomic Fluorescence Spectroscopy

What phenomenon does Atomic Emission Spectroscopy study?

  • The fluorescence of atoms
  • The emissions given out by atoms (correct)
  • The absorption of energy by atoms
  • The scattering of light by atoms

What type of analysis can be performed using Atomic Emission Spectroscopy?

  • Only quantitative analysis
  • Only qualitative analysis
  • Neither qualitative nor quantitative analysis
  • Both qualitative and quantitative analysis (correct)

Which of the following is NOT mentioned as an application of Atomic Emission Spectroscopy?

<p>Analysis of atmospheric pollutants (D)</p> Signup and view all the answers

What is the working principle of Atomic Emission Spectroscopy?

<p>Exciting an atom to a higher energy level and studying the energy emitted when it falls back to its initial level (D)</p> Signup and view all the answers

Which of the following is an application of Atomic Emission Spectroscopy mentioned in the text?

<p>Analysis of agricultural substances like fertilizers and composts (B)</p> Signup and view all the answers

What is the wavelength of the strong red line in the atomic spectrum of lithium?

<p>The text does not mention the wavelength of lithium's red line. (B)</p> Signup and view all the answers

Which of the following statements about calcium is true?

<p>Both a and b are true. (D)</p> Signup and view all the answers

Which of the following is true about flames used in spectroscopic analysis?

<p>Flames are used for molecules that do not require extremely high temperatures for atom excitation during quantitative analysis. (D)</p> Signup and view all the answers

What is the purpose of the burner head in flame atomic emission spectroscopy?

<p>It is made up of a single or multiple slots, as well as a Meker-style burner. (B)</p> Signup and view all the answers

Which of the following statements about plasma is true?

<p>Plasma is a gaseous mixture that is electrically conductive and contains high quantities of cations and electrons. (D)</p> Signup and view all the answers

What is the purpose of the nebulization and spray chamber assembly in flame atomic emission spectroscopy?

<p>It is the same assembly used in atomic absorption for atomization and excitation in flame atomic emission. (B)</p> Signup and view all the answers

What causes the high temperature of a plasma?

<p>Resistive heating as electrons and argon ions flow through the gas (D)</p> Signup and view all the answers

Which type of plasma is considered the most important?

<p>Inductively coupled plasma (ICP) (B)</p> Signup and view all the answers

What is the potential difference employed in an AC arc?

<p>1000 volts or more (B)</p> Signup and view all the answers

Which of the following is used for identification and determination of elements present in very small concentrations?

<p>DC arc (B)</p> Signup and view all the answers

What is the purpose of using a condenser in a spark?

<p>To increase the current (A)</p> Signup and view all the answers

Which of the following instruments uses atomic emission spectroscopy (AES)?

<p>Inductively coupled plasma (ICP-AES) (A)</p> Signup and view all the answers

What is the primary function of the ion detection system in mass spectrometry?

<p>To measure the intensity of ions with different mass-to-charge ratios (D)</p> Signup and view all the answers

Which of the following processes is NOT performed by a mass spectrometer?

<p>Fragmenting all ions in the sample (D)</p> Signup and view all the answers

What is the first stage in the process of mass spectrometry?

<p>Ionization (C)</p> Signup and view all the answers

Which component of a mass spectrometer is responsible for separating the ions based on their mass-to-charge ratio?

<p>Mass analyzer (D)</p> Signup and view all the answers

What is the purpose of accelerating the ions in mass spectrometry?

<p>To impart kinetic energy to the ions for deflection (B)</p> Signup and view all the answers

What is the final stage in the process of mass spectrometry?

<p>Detection (D)</p> Signup and view all the answers

What experimental advances did Joseph von Fraunhofer make during the early 1800s?

<p>Enabled spectroscopy to become a more precise and quantitative scientific technique (C)</p> Signup and view all the answers

What is the main purpose of using spectroscopy as a scientific technique?

<p>All of the above (D)</p> Signup and view all the answers

What is the principle behind atomic spectroscopy?

<p>All of the above (D)</p> Signup and view all the answers

What is the purpose of using a lamp with a specific wavelength in atomic absorption spectroscopy (AAS)?

<p>To measure the concentration of the analyte (B)</p> Signup and view all the answers

Which of the following is NOT a key application of spectroscopy?

<p>Investigating the properties of electromagnetic radiation (C)</p> Signup and view all the answers

What is the main purpose of atomic spectroscopy?

<p>All of the above (D)</p> Signup and view all the answers

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