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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 76 of 200

Q76
General ScienceChemistry
Which transitions are studied by UV spectrometer?
  1. a.Rotational
  2. b.Electronic
  3. c.Nuclear
  4. d.Vibrational

Answer: (B) Electronic

Ultraviolet and visible photons have enough energy to move electrons between molecular orbitals, so UV spectroscopy studies electronic transitions. Rotational transitions are studied with microwaves, vibrational ones with infrared, and nuclear spin transitions with radio waves in NMR.

Q75 Whole paperQ77