Spectroscopy
UV-Vis spectroscopy of organic compounds is usually concerned with which electronic transition(s)?

n → σ*
none of these
n → π* and π → π*
σ → σ*

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Spectroscopy
Vibrational spectroscopy is

a class of spectroscopic techniques which analyzes molecular motions
an Infrared spectroscopy
a large mass on a weak spring
a flashlight through a prism and shake it

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Spectroscopy
Why are rotational transitions of little use to a spectroscopist?

Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions
All of these
Because rotational transitions are extremely rare
Because the energy required to induce a rotational transition is so small that it cannot be measured

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Spectroscopy
Beer's Law states that

None of these
absorbance is equal to P0 / P
absorbance is proportional to both the path length and concentration of the absorbing species
absorbance is proportional to the log of the concentration of the absorbing species

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