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 :

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Transition metal oxides in very high oxidation states (+5, +6, +7) tend to be covalent and acidic in nature.
Updated On: Feb 4, 2026
  • A, B and D Only
  • A, C and D Only
  • A, B and C Only
  • A, B, C and D
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The Correct Option is A

Solution and Explanation


Step 1: Understanding the Concept:
Manganese (\( Mn \)) is a transition metal capable of high oxidation states. \( Mn_2O_7 \) is its highest oxide, formed by the reaction of \( KMnO_4 \) with concentrated \( H_2SO_4 \).

Step 2: Detailed Explanation:
Statement A: Manganese has a valence electron configuration of \( [Ar] 3d^5 4s^2 \). Its maximum oxidation state is +7, which is found in \( Mn_2O_7 \). Correct.
Statement B: High oxidation states are stabilized by oxygen due to its ability to form \( p\pi-d\pi \) multiple bonds. Correct.
Statement C: \( Mn_2O_7 \) is a green oily liquid at room temperature and is highly explosive. Its physical properties and high oxidation state indicate it is a covalent oxide, not ionic. Incorrect.
Statement D: The structure of \( Mn_2O_7 \) consists of two \( MnO_4 \) tetrahedra sharing a common vertex (a bridged oxygen atom, \( O_3Mn-O-MnO_3 \)). Correct.
Thus, A, B, and D are correct.

Step 3: Final Answer:
The correct statements are A, B and D only.
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