Electronic Spectroscopy

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