A molecular sample is illuminated with light of wavelength

CHEMISTRY · Single correct · A Level · Chemistry · Organic analysis and spectroscopy · Organic analysis and spectroscopy

Problem

550\,\text{nm}

. Which type of transition is the light most likely to promote in the molecules? (a)

\text{A vibrational transition in a covalent bond}

(b)

\text{A rotational transition about a principal axis}

(c)

\text{An electronic transition between valence molecular orbitals}

(d)

\text{A nuclear spin flip that gives rise to an NMR signal}