Why are rotational transitions of little use to a spectroscopist?

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

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

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

Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions

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

n → σ*

n → π* and π → π*

σ → σ*

none of these

n → σ*

n → π* and π → π*

σ → σ*

none of these

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Spectroscopy
Which of the following will oscillate the fastest?

A large mass on a stiff spring

A small mass on a weak spring

A large mass on a weak spring

A small mass on a stiff spring

A large mass on a stiff spring

A small mass on a weak spring

A large mass on a weak spring

A small mass on a stiff spring

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Spectroscopy
Molar absorbtivity is the measure of the

amount of light absorbed per unit length

None of these

amount of light reflected and absorbed per unit concentration

amount of light absorbed per unit concentration

amount of light absorbed per unit length

None of these

amount of light reflected and absorbed per unit concentration

amount of light absorbed per unit concentration

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Spectroscopy
Molar absorbtivities of compounds exhibiting charge transfer absorption are

moderate

none of these

large

small

moderate

none of these

large

small

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Spectroscopy
Why must the voltage supplied to a tungsten lamp be very stable?

Because the lamp will only function at a specific voltage

All of these

Because if it wasn't, the lamp would bum out

Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage

Because the lamp will only function at a specific voltage

All of these

Because if it wasn't, the lamp would bum out

Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage

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Spectroscopy

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

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

Spectroscopy Which of the following will oscillate the fastest?

Spectroscopy Molar absorbtivity is the measure of the

Spectroscopy Molar absorbtivities of compounds exhibiting charge transfer absorption are

Spectroscopy Why must the voltage supplied to a tungsten lamp be very stable?

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

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

Spectroscopy
Which of the following will oscillate the fastest?

Spectroscopy
Molar absorbtivity is the measure of the

Spectroscopy
Molar absorbtivities of compounds exhibiting charge transfer absorption are

Spectroscopy
Why must the voltage supplied to a tungsten lamp be very stable?