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Spectroscopy (Grades 11-12)

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Spectroscopy is the study of the interaction of matter with                                                         .
What is the correct value of Planck's constant (h), according to Planck's quantum theory?
  1. [math]h = 6.625 xx 10^-34 J[/math][math][/math]
  2. [math]h = 6.520 xx 10^-30 C[/math]
  3. [math]h = 6.645 xx 10^-25 J[/math]
  4. [math]h = 6.21 xx 10^-20 C[/math]
According to Beer's law, equal fractions of the incident light are absorbed by successive layers having equal concentration of the absorbing medium.
  1. True
  2. False
Which of the following types of electromagnetic radiation is extensively used for spectroscopic studies?
  1. Ultraviolet rays
  2. Gamma rays
  3. X rays
  4. Radiowaves
Which of the following electromagnetic rays are absorbed to bring about the vibrations of constituent atoms in a molecule?
  1. Ultraviolet rays
  2. Gamma rays
  3. Infrared rays
  4. Visible rays
Which electromagnetic radiation is absorbed to bring about electronic transitions in a molecule?
  1. UV-visible rays
  2. X rays
  3. Gamma rays
  4. Infrared rays
Which concentration range defines the sensitivity of UV-Visible spectroscopy when it is used for qualitative and quantitative analysis of compounds?
  1. [math]10^-7 to 10^-2 M[/math]
  2. [math]10^-5 to 10^-3 M[/math]
  3. [math]10^-4 to 10^-1 M[/math]
  4. [math]10^-6 to 10^-5 M[/math]
What is the [math]lambda_max[/math] value of acetic acid when spectroscopic analysis is carried out using ethyl alcohol as the solvent?
  1. 208 nm
  2. 220 nm
  3. 178 nm
  4. 201 nm
UV-visible spectroscopy is used to distinguish between                and                    isomers of a compound.
Infrared (IR) spectroscopy is commonly used to identify find functional groups in organic compounds.
  1. True
  2. False
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