Question 40 of 44intermediate🧠 RememberVery Short1 mark

Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.

Correct Answer

MnO₄⁻ (permanganate) and Cr₂O₇²⁻ (dichromate)

Exercise: EXERCISES | Q: 4.6 | (Chapter: 27)
For More Understanding

Explanation

The question asks for oxometal anions where the metal exhibits oxidation state equal to its group number. From the context, the highest oxidation number coincides with the group number and is attained from Sc₂O₃ to Mn₂O₇. In the example provided, Cr₂O₇²⁻ and MnO₄⁻ are mentioned as oxoanions. In MnO₄⁻, manganese exhibits +7 oxidation state (Group 7), and in Cr₂O₇²⁻, chromium exhibits +6 oxidation state (Group 6). Both satisfy the condition where oxidation state equals group number.

Solution Steps

  1. Step 1: Identify oxometal anions mentioned in context - Cr₂O₇²⁻ and MnO₄⁻

  2. Step 2: Check oxidation states - Mn has +7 (Group 7), Cr has +6 (Group 6)

  3. Step 3: Both metals exhibit oxidation state equal to their group number

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