The most basic oxide among the following is

Options

A. `MnO_2 `
B. `Mn_2O_7 `
C. `MnO `
D. `Mn_2O_6 `

Answer

To determine the most basic oxide among the given options (MnO2, Mn2O7, MnO, Mn2O6), we need to analyze the oxidation states of manganese (Mn) in each oxide and understand how oxidation state affects basicity.

### Step-by-Step Solution:

1. **Identify the Oxidation States:**
- For **MnO**: The oxidation state of Mn is +2.
- For **MnO2**: The oxidation state of Mn is +4.
- For **Mn2O6**: The oxidation state of Mn can be calculated as follows:
- Let the oxidation state of Mn be x. The equation is:
\[ 2x + 6(-2) = 0 \implies 2x - 12 = 0 \implies 2x = 12 \implies x = +6 \]
- For **Mn2O7**: The oxidation state of Mn can be calculated similarly:
- Let the oxidation state of Mn be x. The equation is:
\[ 2x + 7(-2) = 0 \implies 2x - 14 = 0 \implies 2x = 14 \implies x = +7 \]

2. **Assess Basicity Based on Oxidation State:**
- Basicity of oxides generally decreases with increasing oxidation state. Lower oxidation states correspond to more basic character.
- **MnO** has Mn in the +2 oxidation state, which is the lowest among the options.
- **MnO2** has Mn in the +4 oxidation state.
- **Mn2O6** has Mn in the +6 oxidation state.
- **Mn2O7** has Mn in the +7 oxidation state, which is the highest and thus the most acidic.

3. **Conclusion:**
- Since MnO has the lowest oxidation state (+2), it is the most basic oxide among the given options.

### Final Answer:
The most basic oxide among the following is **MnO**.