Q99 · CSIR NET Chemistry, December 2016
Paper: CSIR NET December 2016 · Subject: Physical Chemistry · Chapter: Molecular Spectroscopy · Topic: Raman · Marks: 2 · Difficulty: Easy
Among the following, both microwave and rotational Raman active molecule is
(a)$\mathrm{CH}_{4}$
(b)$\mathrm{N}_{2} \mathrm{O}$
(c)$\mathrm{C}_{2} \mathrm{H}_{4}$
(d)$\mathrm{CO}_{2}$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
N₂O (N–N–O) is linear but polar, so it is microwave-active, and like every linear molecule it is rotational-Raman-active; CO₂ has no dipole, CH₄ is a spherical top.
Study loop for Molecular Spectroscopy