Highest oxidation state of `Mn` is exhibited in `Mn_(2)O_(7)`.The correct statements about `Mn_(2)O_7` , are
(A) `Mn` is tetrahedrally surrounded by oxygen atoms.
(B) `Mn` is octahedrally surrounded by oxygen atoms.
(C) Contains Mn-O-Mn bridge.
(D) Contains Mn-Mn bond.
Choose the correct answer from the options given below:

Options

A. A and D only
B. `A` and `C` only
C. `B` and `C` only
D. `B` and `D` only

Answer

To solve the question regarding the properties of \( \text{Mn}_2\text{O}_7 \), we will analyze each statement provided in the options.

### Step-by-Step Solution:

1. **Understanding the Structure of \( \text{Mn}_2\text{O}_7 \)**:
- \( \text{Mn}_2\text{O}_7 \) is a compound where manganese (Mn) is in its highest oxidation state of +7.
- The structure consists of two manganese atoms and seven oxygen atoms.

2. **Analyzing Statement (A)**:
- **Statement**: "Mn is tetrahedrally surrounded by oxygen atoms."
- **Analysis**: In \( \text{Mn}_2\text{O}_7 \), each manganese atom is surrounded by four oxygen atoms in a tetrahedral arrangement. This is true for one of the manganese centers.
- **Conclusion**: This statement is **correct**.

3. **Analyzing Statement (B)**:
- **Statement**: "Mn is octahedrally surrounded by oxygen atoms."
- **Analysis**: In \( \text{Mn}_2\text{O}_7 \), manganese is not surrounded by six oxygen atoms; instead, it is surrounded by four in a tetrahedral geometry. Thus, this statement is false.
- **Conclusion**: This statement is **incorrect**.

4. **Analyzing Statement (C)**:
- **Statement**: "Contains Mn-O-Mn bridge."
- **Analysis**: The structure of \( \text{Mn}_2\text{O}_7 \) includes a bridging oxygen atom between two manganese atoms, indicating that there is indeed a Mn-O-Mn linkage.
- **Conclusion**: This statement is **correct**.

5. **Analyzing Statement (D)**:
- **Statement**: "Contains Mn-Mn bond."
- **Analysis**: In \( \text{Mn}_2\text{O}_7 \), there is no direct Mn-Mn bond; the manganese atoms are connected through oxygen atoms. Therefore, this statement is false.
- **Conclusion**: This statement is **incorrect**.

### Final Answer:
The correct statements about \( \text{Mn}_2\text{O}_7 \) are:
- (A) Mn is tetrahedrally surrounded by oxygen atoms.
- (C) Contains Mn-O-Mn bridge.

Thus, the correct options are **A and C**.