Calculate the number of vibrational modes for a molecule of methane.
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Which of the following systems will show electron spin resonance (ESR) spectrum? (i) H (ii) (iii)
(iv)
(v)
(vi)
Assuming that the force constants of H-Cl and D-Cl are the same, calculate the fundamental vibration frequency of D-Cl if that of H-Cl is .
What are different mechanisms that contribute to the relaxation of nuclear spins in the excited state? Explain any one of them.
Raman rotational spectra of was observed with Hg light with Rayleigh line at
. Stokes lines were observed at
. Draw the rotational energy level diagram with Stokes and anti Stokes lines.
What is the photoelectric effect? Write the equation of Einstein’s photoelectric law.
Explain why the atomic spectra are line spectra whereas the molecular spectra are band spectra.
Nitrogen has more valence electrons than fluorine or aluminium, therefore its peak appears at the highest binding energy.