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</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</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</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.</p> Signup and view all the answers

    Which of the following statements about calcium is true?

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

    Which type of plasma is considered the most important?

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

    What is the potential difference employed in an AC arc?

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

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

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

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

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

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

    <p>Ionization</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</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</p> Signup and view all the answers

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

    <p>Detection</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</p> Signup and view all the answers

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

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

    What is the principle behind atomic spectroscopy?

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

    What is the main purpose of atomic spectroscopy?

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

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