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Which of the following statements is wrong?
  • a)
     UV absorption is attributable to electronic transitions.
  • b)
     UV spectra provide information about valence electrons.
  • c)
    IR absorption is attributable to transitions between rotational energy levels of whole molecules.
  • d)
     NMR spectrometers use radiofrequency electromagnetic radiation.
Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements is wrong?a)UV absorption is attribut...
For a general discussion on electromagnetic radiation and spectroscopy. Transitions between molecular rotational energy levels are induced not by IR radiation, but by microwave radiation.
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Which of the following statements is wrong?a)UV absorption is attribut...
Explanation:

- UV absorption is attributable to electronic transitions: This statement is correct. UV absorption occurs when molecules absorb energy in the form of UV light, promoting electrons to higher energy levels.
- UV spectra provide information about valence electrons: This statement is also correct. UV spectra can be used to analyze the electronic structure of molecules, providing information about valence electrons and electronic transitions.
- IR absorption is attributable to transitions between rotational energy levels of whole molecules: This statement is incorrect. IR absorption is actually attributable to transitions between vibrational energy levels of molecules, not rotational energy levels. IR spectroscopy is used to study molecular vibrations.
- NMR spectrometers use radiofrequency electromagnetic radiation: This statement is correct. NMR (Nuclear Magnetic Resonance) spectrometers use radiofrequency electromagnetic radiation to study the behavior of atomic nuclei in a magnetic field.
In summary, the incorrect statement is option 'C' as IR absorption is related to vibrational energy levels, not rotational energy levels.
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Which of the following statements is wrong?a)UV absorption is attributable to electronic transitions.b)UV spectra provide information about valence electrons.c)IR absorption is attributable to transitions between rotational energy levels of whole molecules.d)NMR spectrometers use radiofrequency electromagnetic radiation.Correct answer is option 'C'. Can you explain this answer?
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