Q66 · CSIR NET Chemistry, December 2017
Paper: CSIR NET December 2017 · Subject: Physical Chemistry · Chapter: Group Theory · Topic: Group Theory – General · Marks: 2 · Difficulty: Easy
The molecule with a C 2 axis of symmetry among the following is
(a)$\mathrm{BH}_{2} \mathrm{Cl}$
(b)$\mathrm{CH}_{3} \mathrm{Cl}$
(c)$\mathrm{NH}_{2} \mathrm{Cl}$
(d)HOCl
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
BH₂Cl is planar (C₂v) with a C₂ axis along the B–Cl bond; CH₃Cl has only C₃, and NH₂Cl and HOCl are C_s.
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