1.

Which of the following oxides of manganese is amphoteric?

A. \[Mn{{O}_{2}}\]
B. \[M{{n}_{2}}{{O}_{3}}\]
C. \[M{{n}_{2}}{{O}_{7}}\]
D. \[MnO\]
Answer» B. \[M{{n}_{2}}{{O}_{3}}\]


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