Answer:
The lowest oxidation state of
manganese is \[+2\,\,\overset{II}{\mathop{(Mn)}}\,\]. It has a tendency to lose
electrons in order to increase its oxidation state. Therefore, \[\,\,\overset{II}{\mathop{(Mn)}}\,\]
is basic. In highest oxidation state of \[+7\,\,\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,VII}{\mathop{(Mn)}}\,,\],
there is no scope for the loss of anymore electrons. It can rather accept the
same. This shows that \[\overset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,VII}{\mathop{Mn}}\,\]
can act as acid by accepting electrons.
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