Which series of the hydrogen spectrum lies in the visible region?
A{'text': 'Lyman', 'label': 'A'}
B{'text': 'Paschen', 'label': 'B'}
C{'text': 'Balmer', 'label': 'C'}
D{'text': 'Brackett', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'Balmer', 'label': 'C'}
1. Hydrogen spectral series are named for their common ending n.
2. Lyman ends at n = 1 (UV); Balmer at n = 2 (visible); Paschen at n = 3 (IR).
3. The visible-range emissions H-α (656 nm), H-β (486 nm), etc. all belong to Balmer.
4. Balmer series played a historic role in developing atomic theory.
_Source: NCERT Class 11 Chemistry, Ch 2 "Structure of Atom", §2.4_
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