nursing AIIMS BSc Nursing 2025 Mock Test Series Chemistry d And f - Block Elements

Which of the following is amphoteric oxide?

Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4 

1
V2O5, Cr2O3
2
Mn2O7, CrO3 
3
CrO, V2O5 
4
V2O5, V2O4
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