Question

Given below are some of the statements about Mn and \( Mn_2O_7 \). Identify the correct statements.
A. Mn forms the oxide \( Mn_2O_7 \), in which Mn is in its highest oxidation state.
B. Oxygen stabilizes the Mn in higher oxidation states by forming multiple bonds with Mn.
C. \( Mn_2O_7 \) is an ionic oxide.
D. The structure of \( Mn_2O_7 \) consists of one bridged oxygen.
Choose the correct answer from the options given below :

• A. A, B and D Only
• B. A, C and D Only
• C. A, B and C Only
• D. A, B, C and D

Hint:

Transition metal oxides in very high oxidation states (+5, +6, +7) tend to be covalent and acidic in nature.

Answer 1

The Correct Option is A

To identify the correct statements about \( \text{Mn} \) and \( \text{Mn}_2\text{O}_7 \), we evaluate each given statement:

1. **Statement A**: "Mn forms the oxide \( \text{Mn}_2\text{O}_7 \), in which Mn is in its highest oxidation state." - In \( \text{Mn}_2\text{O}_7 \), each Mn is in the +7 oxidation state, which is indeed the highest oxidation state known for manganese. Therefore, statement A is correct.
2. **Statement B**: "Oxygen stabilizes the Mn in higher oxidation states by forming multiple bonds with Mn." - Oxygen can form multiple bonds with manganese, such as double bonds, which help to stabilize Mn in its higher oxidation states. Therefore, statement B is correct.
3. **Statement C**: "\( \text{Mn}_2\text{O}_7 \) is an ionic oxide." - \( \text{Mn}_2\text{O}_7 \) is actually a covalent compound, not an ionic one. The structure involves covalent bonding between Mn and O atoms. Therefore, statement C is incorrect.
4. **Statement D**: "The structure of \( \text{Mn}_2\text{O}_7 \) consists of one bridged oxygen." - The structure of \( \text{Mn}_2\text{O}_7 \) includes an Mn-O-Mn linkage, which involves a bridged oxygen atom between the two manganese atoms. Therefore, statement D is correct.

Based on the analysis above, the correct statements are A, B, and D. Hence, the correct answer is:

A, B and D Only 

Conclusion: The statements that accurately describe the properties and structure of \( \text{Mn}_2\text{O}_7 \) are related to its high oxidation state, oxygen's role in stabilizing the compound, and the presence of a bridged oxygen in its structure.