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ChemistryJEE Main 6 Apr 2026, Shift 1·Q2·MCQ·Easy–moderate

Structure of Atom · Hydrogen spectrum series wavelengths

If shortest wavelength of hydrogen atom in Lyman series is x, then longest wavelength in Balmer series of HeX+\ce{He+} is :
  1. (1)9x5\dfrac{9x}{5}
  2. (2)36x5\dfrac{36x}{5}
  3. (3)x4\dfrac{x}{4}
  4. (4)5x9\dfrac{5x}{9}

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See the full 6 Apr 2026, Shift 1 paper