Q28 · CSIR-NET Chemistry, December 2014

Paper: CSIR-NET December 2014 · Subject: Physical Chemistry · Chapter: Group Theory · Topic: Symmetry Elements Point Groups · Marks: 2 · Difficulty: Medium

The product $\sigma^{xy} \cdot S_4^{z}$ ($S_4^{z}$ is the four fold improper axis of rotation around the $z$-axis, and $\sigma^{xy}$ is the reflection in the $xy$ plane) is
(a)$C_4^{z}$
(b)$C_4^{z} \cdot i$
(c)$C_{4}^{y}$
(d)$C_{2}^{z}$
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
S₄ = σ_h C₄, so σ_xy · S₄ = σ_h σ_h C₄ = C₄(z) (a).

Study loop for Group Theory

1. Practise the PYQsPrevious-year questions, with answers

· Browse this chapter in the app