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- 1. Multiple Choice
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
- 2. Multiple Choice
Which of the following transitions are of weak intensities and lie in the visible region?
n→π*
σ→σ*
π→π*
n→σ*
- 3. Multiple Choice
Which of the following transitions are of weak intensities and lie in the visible region?
n→π*
σ→σ*
π→π*
n→σ*
- 4. Multiple Choice
Which of the following transitions are of weak intensities and lie in the visible region?
n→π*
σ→σ*
π→π*
n→σ*
- 5. Multiple Choice
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*
- 6. Multiple Choice
Which of the following is not an auxochrome group?
–OH
–SH
–OR
–O2
- 7. Multiple Choice
Which of the following shift leads to the decreased intensity of absorption?
Hypochromic
Hyperchromic
Hypsochromic
Bathochromic
- 8. Multiple Choice
Increase in the intensity of absorp in UV-Visible spectrum is called
Hypsochromic
Bathochromic
Hyperchromic
Hypochromic
- 9. Multiple Choice
An absorption towards longer wavelength is called
Bathochromic shift
Hypsochromic shift
Hyperchromic shift
Hypochromic shift
- 10. Multiple Choice
An absorption towards shorter wavelength is called as
Bathochromic shift
Hypsochromic shift
Hyperchromic shift
Hypochromic shift
- 11. Multiple Choice
Methane molecule show ------- electronic transition
σ→σ*
π→π*
n→π*
n→σ*
- 12. Multiple Choice
In hyperchromic shift, extinction coefficient is
Small
Large
No change
None of the above
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