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WorksheetsElectronic Spectroscopy
Total questions: 12
Worksheet time: 6mins
The electronic spectra in the visible range span is __________
25000-72000 cm-1
25000-50000 cm-1
12500-25000 cm-1
15000-30000 cm-1
Which of the following transitions are of weak intensities and lie in the visible region?
n→π*
σ→σ*
π→π*
n→σ*
Which of the following transitions are of weak intensities and lie in the visible region?
n→π*
σ→σ*
π→π*
n→σ*
Which of the following transitions are of weak intensities and lie in the visible region?
n→π*
σ→σ*
π→π*
n→σ*
Arrange the various electronic transitions in the order of increasing energy.
n→σ* < π→π* < n→π* < σ→σ*
n→π* < π→π* < n→σ* < σ→σ*
n→σ* < n→π* < π→π* < σ→σ*
σ→σ* < π→π* < n→π* < n→σ*
Which of the following is not an auxochrome group?
–OH
–SH
–OR
–O2
Which of the following shift leads to the decreased intensity of absorption?
Hypochromic
Hyperchromic
Hypsochromic
Bathochromic
Increase in the intensity of absorp in UV-Visible spectrum is called
Hypsochromic
Bathochromic
Hyperchromic
Hypochromic
An absorption towards longer wavelength is called
Bathochromic shift
Hypsochromic shift
Hyperchromic shift
Hypochromic shift
An absorption towards shorter wavelength is called as
Bathochromic shift
Hypsochromic shift
Hyperchromic shift
Hypochromic shift
Methane molecule show ------- electronic transition
σ→σ*
π→π*
n→π*
n→σ*
In hyperchromic shift, extinction coefficient is
Small
Large
No change
None of the above
