MCQ
Which of the following is paramagnetic ?
- ✓$N_2$
- B$H_2$
- C$Li_2$
- D$O_2$
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$\mathrm{S}_2 \mathrm{O}_3^{2-}, \mathrm{SO}_4^{2-}, \mathrm{SO}_3^{2-}, \mathrm{S}_2 \mathrm{O}_7^{2-}$

