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ChemistryJEE Main 24 Jan 2026, Shift 2·Q13·MCQ·Easy–moderate

Structure of Atom · Hydrogen-like spectrum rydberg formula

The wavelength of spectral line obtained in the spectrum of LiX2+\ce{Li^2+} ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is
  1. (1)2.28×10−72.28\times10^{-7} cm
  2. (2)2.28×10−62.28\times10^{-6} cm
  3. (3)1.14×10−71.14\times10^{-7} cm
  4. (4)1.14×10−61.14\times10^{-6} cm
We corrected a printing error in the original paper

Source printed “LI2+^{2+} ion”.

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See the full 24 Jan 2026, Shift 2 paper