JEE Main 2023ChemistryStructure of AtomEasyMCQ

JEE Main 2023Structure of Atom Question with Solution

JEE Main 2023 (29 Jan Shift 1)

Question

The shortest wavelength of hydrogen atom in Lyman series is λ. The longest wavelength in Balmer series of He+ is

Choose an option

Show full solutionCorrect option: B
Correct answer
B9λ5

Step-by-step explanation

For Hydrogen atom (H) (Z = 1) : 1λH=RH×12112-12 ...(1)

For He+ atom (Z = 2) : 1λHe+=RH×22×122-132 = RH 1 - 49 = RH 59 ..(2)

From (1) & (2)

λHe+λH=95

λHe+=λ×95

λHe+=9λ5.

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About this question

This is a previous-year question from JEE Main 2023, 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.