WorksheetsPhotonics electronic spectra of molecules
Total questions: 16
Worksheet time: 16mins
The molecular orbital can be represented as ...
sum of atomic orbitals
product of atomic orbitals
linear combination of atomic orbitals
Name the orbital being formed
Bonding
Antibonding
Nonbonding
Name the orbital being formed
Bonding
Antibonding
Nonbonding
The greatest energy is characteristic of ...
antibonding π* orbital
bonding σ orbital
non-bonding n orbital
antibonding σ* orbital
Bonding molecular orbitals are also called ...
occupied
vacant
free
Antibonding molecular orbitals are also called ...
occupied
vacant
free
Which molecular orbitals are antisymmetric with respect to the plane passing through the atomic nuclei and have one nodal surface (антисимметричны относительно проходящей через ядра атомов плоскости и имеют одну узловую поверхность)?
σ-orbitals
π-orbitals
s-orbitals
p-orbitals
What transitions are allowed?
π → σ*
π → π*
n → σ*
n → π*
In the longest wavelength region, there are ... transitions.
σ → σ*
π → π*
n → σ*
n → π*
With an increase in the polarity of the solvent, ... of π → π* band occurs.
hypsochromic shift
bathochromic shift
Stokes shift
With an increase in the polarity of the solvent, ... of n → π* band occurs.
hypsochromic shift
bathochromic shift
Stokes shift
The lifetime of an excited state is ... to the total probability of spontaneous transitions from this state.
proportional
equal
inversely proportional
The absorption of electromagnetic radiation by a substance is described by the law of ...
Franck-Condon
Bouguer- Lambert- Beer
Kirchhoff
Snell
For which objects does the Bouguer- Lambert- Beer law fail?
Scattering media
Weakly luminescent media
Additive mixtures
The most probable transition is such that neither the position of the nuclei nor the momentum changes (не изменяются ни положение ядер, ни импульс).
Franck-Condon principle
Bouguer- Lambert- Beer law
Kirchhoff's law
Snell's Law
An integrating sphere is intended for measuring the absorption spectra of ...
luminescent media
non-additive mixtures
light-scattering media
