How many oxides are amphoteric in nature ZnO, MgO, Cr2O3 ,MnO2, MnO, PbO2, SnO, GeO, CO.

Amphoteric oxides are oxides that can act as both acid and base. In the given list, the amphoteric oxides are:

1. ZnO (Zinc Oxide): It can react with both acids and bases to form salts, thus showing amphoteric behavior.

2. Cr2O3 (Chromium(III) Oxide): It also shows amphoteric behavior as it can react with both acids and bases.

3. PbO2 (Lead(IV) Oxide): It is also an amphoteric oxide.

4. SnO (Tin(II) Oxide): It is amphoteric in nature.

5. GeO (Germanium(II) Oxide): It is also an amphoteric oxide.

So, there are 5 oxides in the given list that are amphoteric in nature.