MCQ
निम्न में कौन उभयधर्मी ऑक्साइड है?
- ✓$\mathrm{Cr}_2 \mathrm{O}_3$
- B$\mathrm{Mn}_2 \mathrm{O}_7$
- C$\mathrm{V}_2 \mathrm{O}_3$
- D$\mathrm{CrO}$
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