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Structure of Atom question

2024 · 29 Jan · Shift 2 · Q6
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Structure of Atom question

2024 · 29 Jan · Shift 2 · Q6

JEE MainChemistryStructure of AtomMCQ+4 / −1

Match List I with List II

List - I
(Spectral Series for Hydrogen)		 List - II
(Spectral Region/Higher Energy State)
(A) Lyman (I) Infrared region
(B) Balmer (II) UV region
(C) Paschen (III) Infrared region
(D) Pfund (IV) Visible region

Choose the correct answer from the options given below:

  1. A
    A-II, B-IV, C-III, D-I
  2. B
    A-I, B-III, C-II, D-IV
  3. C
    A-II, B-III, C-I, D-IV
  4. D
    A-I, B-II, C-III, D-IV
View written solutionFree

Correct answer: A

  1. Recall the hydrogen spectral series

    For hydrogen atom, the important spectral series are:

    • Lyman series: transitions ending at n=1n=1n=1
    • Balmer series: transitions ending at n=2n=2n=2
    • Paschen series: transitions ending at n=3n=3n=3
    • Pfund series: transitions ending at n=5n=5n=5

  2. Identify their spectral regions

    • Lyman series lies in the ultraviolet (UV) region.
    • Balmer series lies in the visible region.
    • Paschen series lies in the infrared region.
    • Pfund series also lies in the infrared region.

  3. Match List I with List II

    Thus,

    • (A)(A)(A) Lyman →\to→ (II)(II)(II) UV region
    • (B)(B)(B) Balmer →\to→ (IV)(IV)(IV) Visible region
    • (C)(C)(C) Paschen →\to→ (III)(III)(III) Infrared region
    • (D)(D)(D) Pfund →\to→ (I)(I)(I) Infrared region

  4. Check with options

    The matching obtained is:

    A−II,  B−IV,  C−III,  D−IA-II,\; B-IV,\; C-III,\; D-IA−II,B−IV,C−III,D−I

    This corresponds to Option A.

  5. Comparison with stored answer

    Stored correct answer = A

    Our derived answer = A

    Hence, the answer agrees.

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