Question

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

• A. \( O_2 \) - Both diamagnetic, \( O_2^{2-} \) - Both paramagnetic
• B. \( O_2 \) - Both paramagnetic, \( O_2^{2-} \) - Both paramagnetic
• C. \( O_2 \) - Both diamagnetic, \( O_2^{2-} \) - Both paramagnetic
• D. \( O_2 \) - Both paramagnetic, \( O_2^{2-} \) - Both paramagnetic

Hint:

Remember that \( O_2 \) is paramagnetic due to its unpaired electrons, while \( O_2^{2-} \) is diamagnetic because all electrons are paired.

Answer 1

The Correct Option is C

The oxygen molecule \( O_2 \) is paramagnetic, but the \( O_2^{2-} \) ion is diamagnetic. Therefore, option (c) presents the correct description.

Step 2: Conclusion.
The correct description is \( O_2 \) - diamagnetic, \( O_2^{2-} \) - paramagnetic, corresponding to option (c).