Q93 · CSIR-NET Chemistry, June 2012

Paper: CSIR-NET June 2012 · Subject: Physical Chemistry · Chapter: Statistical Thermodynamics · Topic: Statistical Thermodynamics – General · Marks: 2 · Difficulty: Medium

The term symbol for the first excited state of Be with the electronic configuration $1 \mathrm{s}^{2} 2 \mathrm{s}^{1} 3 \mathrm{s}^{1}$ is

(a)${ }^{3} \mathrm{S}^{1}$

(b)${ }^{3} \mathrm{S}_{0}$

(c)${ }^{1} \mathrm{S}_{0}$

(d)${ }^{2} \mathrm{S}_{1 / 2}$

Answer

Answer: C ✓ checked by 4AB · confidence high

Explanation

W = 6!/(0!·1!·2!·3!) = 720/12 = 60, so S = k_B ln 60.

Study loop for Statistical Thermodynamics

1. Practise the PYQsPrevious-year questions, with answers

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