Arrange the following in increasing order of basic character:
`MnO, MnO_(2),Mn_(2)O_(7)`

Explanation

To arrange the compounds MnO, MnO₂, and Mn₂O₇ in increasing order of basic character, we need to analyze their oxidation states and how they relate to basicity.

### Step-by-Step Solution:

1. **Identify the Oxidation States:**
- For **MnO**:
- Let the oxidation state of Mn be \( x \).
- The oxidation state of O is \(-2\).
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