Q112 · CSIR NET Chemistry, December 2011
Paper: CSIR NET December 2011 · Subject: Physical Chemistry · Chapter: Quantum Chemistry · Topic: Perturbation Theory · Marks: 2 · Difficulty: Medium
For non-degenerate perturbation theory for ground state, with $E_0^{(0)}$ as zeroth order energy, $E_0^{(1)}$ as the first-order perturbation correction and $E_0$ as the exact energy, which of the following is true?
(a)$\left(E_0^{(0)} + E_0^{(1)}\right)$ is always equal to $E_0$
(b)$\left(E_0^{(0)} + E_0^{(1)}\right) \leq E_0$
(c)$\left(E_0^{(0)} + E_0^{(1)}\right) \geq E_0$
(d)$E_0 \leq \left(E_0^{(1)} + E_0\right)$
Answer
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Explanation
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