Subject: Physical Chemistry · Chapter: Options · Topic: Options – General · Exam: NET 2020-2021 · Marks: 2 · Difficulty: Medium
In linear variation method using two orthogonal basis functions, the two roots obtained are $\in_{0}$ and $\in_{1}\left(\in_{0}<\in_{1}\right)$. The correct relation of these with exact ground and first excited state energies, $\mathrm{E}_{0}$ and $\mathrm{E}_{1}$, respectively, is (1) $\in_{0} \geq \mathrm{E}_{0}$ and $\in_{1}<\mathrm{E}_{1}$ (2) $\epsilon_{0}<\mathrm{E}_{1}$ and $\epsilon_{1} \geq \mathrm{E} 1$ (3) $\in_{0}<\mathrm{E}_{0}$ and $\in_{1}<\mathrm{E} 1$ (4) $\in_{0} \geq \mathrm{E}_{0}$ and $\in_{1} \geq \mathrm{E} 1$