A) \[Mn{{O}_{2}}\]
B) \[M{{n}_{2}}{{O}_{3}}\]
C) \[M{{n}_{2}}{{O}_{7}}\]
D) \[MnO\]
Correct Answer: A
Solution :
[a] The more the oxidation state, the more is the acid character, \[MnO,M{{n}_{2}}{{O}_{3}}\] are basic, \[Mn{{O}_{2}}\] is amphoteric and \[M{{n}_{2}}{{O}_{7}}\] is acidic.
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