Electronic transitions are called vertical transitions. Comment.
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Electronic transitions are called vertical transitions. Comment.
What is meant by AX spin system in NMR? Draw a schematic energy level diagram for this system and show the allowed transitions.
The frequencies of the first and second overtones respectively are exactly double and triple of the fundamental vibration frequency. Comment.
What is meant by anisotropy of chemical bond? Give an example.
A photoelectron spectrum of a compound containing nitrogen (N), aluminium (Al), and fluorine (F) shows three strong peaks at the following binding energies:
Peak X: ~686 eV
Peak Y: ~399 eV
Peak Z: ~73 eV
Find the best option from the choices given below that best explains the relative positioning of these peaks in terms of binding energy.
(i) Peak X corresponds to F 1s electrons, which have the highest binding energy because fluorine’s high electronegativity and small size give its 1s electrons a large effective nuclear attraction. Peak Y is N 1s and Peak Z is Al 2p.
(ii) Nitrogen has more valence electrons than fluorine or aluminium, therefore its peak appears at the highest binding energy.
(iii) The spectrum shows more aluminium atoms than nitrogen or fluorine, so its peak appears at the lowest binding energy due to dilution.
(iv) Aluminium has the highest nuclear charge, so its 2p peak should have the largest binding energy, but shielding effects reverse this trend.
Justify your answer.
5G services in India are provided at a frequency of . Calculate the wavelength of the radiation.
In Raman spectra, the Stokes line are more intense than the anti-Stokes lines. Why?