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WorksheetsUV Spectroscopy
Total questions: 15
Worksheet time: 15mins
UV radiation extends from
10 nm to 400 nm
100 nm to 400 nm
50 nm to 400 nm
150 nm to 400 nm
Energy and Wavelength are ---------- to each other.
Directly proportional
Inversely proportional
How many electronic transitions are possible in UV-Visible spectroscopy?
3
4
5
6
UV spectrum is a plot of ------------ versus absorption intensity
frequency
wavelength
wavenumber
energy
UV spectrum is sharp say yes or no
yes
no
Shift of an absorption maximum to longer wavelength is called
Hyperchromic shift
Hypsochromic shift
Bathochromic shift
Hypochromic shift
Which transition requires higher energy?
sigma to sigma *
pi to pi*
n to sigma*
n to pi*
Which transition requires low energy?
sigma to sigma *
pi to pi*
n to sigma*
n to pi*
Which one is the forbidden transition?
sigma to sigma *
pi to pi*
n to sigma*
n to pi*
What is the absorption maximum value of 1,3-butadiene?
215 nm
216 nm
217 nm
219 nm
Which rule is used to calculate the absorption maximum of organic compounds?
Woodward-Fischer Rule
Woodward Rule
Woodward-Fieser Rule
Fischer Rule
UV-Visible region is
100-900 nm
200-500 nm
100-800 nm
200-800 nm
When a molecule absorbs energy in the UV or Visible region
-------------------- transition takes place?
Vibrational
Rotational
Electronic
Vibrational-rotational
Which among the following impart colour to the organic compound?
Auxochrome
Chromophore
Chromone
Auxochromone
Light is an
Electric radiation
Magnetic radiation
Electrochromic radiation
Electromagnetic radiation
