JEE Main 2026 — Structure of Atom Question with Solution
JEE Main 2026 (24 January Shift 2)
Question
The wavelength of spectral line obtained in the spectrum of ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
For Li²⁺ (Z=3): From and , we get ,
Using Bohr wavelength formula:
m⁻¹
cm
Using Bohr wavelength formula:
m⁻¹
cm
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This is a previous-year question from JEE Main 2026, covering the Structure of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.