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Q. Out of following how many oxides are amphoteric in nature. $MnO , Mn _{2} O _{3}, MnO _{2}, MnO _{3}, Mn _{2} O _{7}, Mn _{3} O _{4}$

The d-and f-Block Elements

Solution:

$MnO _{2}, Mn _{2} O _{3}, Mn _{3} O _{4}$ are amphoteric in nature.