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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