Geo-Scientist Prelims 2021 Chemistry Q9: Consider the following pairs of species of oxygen and their…

Consider the following pairs of species of oxygen and their magnetic behavior:

1. O₂⁻, O₂²⁻ → Both diamagnetic
2. O₂⁺, O₂²⁻ → Both paramagnetic
3. O₂⁺, O₂⁻ → Both paramagnetic
4. O, O₂²⁻ → Both paramagnetic

Which of the pair(s) of oxygen species given above represents the correct magnetic behavior?

1. (a) 1 only
2. (b) 1 and 2
3. (c) 3
4. (d) 2 and 4