Q97 · CSIR NET Chemistry, December 2016
Paper: CSIR NET December 2016 · Subject: Physical Chemistry · Chapter: Molecular Spectroscopy · Topic: Molecular Spectroscopy – General · Marks: 2 · Difficulty: Easy
The transition that belongs to the Lyman series in the hydrogen-atom spectrum is
(a)$1 s \leftarrow 4 s$
(b)$1 s \leftarrow 4 p$
(c)$2 s \leftarrow 4 s$
(d)$2 s \leftarrow 4 p$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Lyman lines end on n = 1, and the dipole rule Δl = ±1 requires a p orbital: 1s ← 4p.
Study loop for Molecular Spectroscopy