AIIMS 2018 Chemistry Oxidation States MCQ Question
When acts as an oxidizing agent and ultimately forms , , and , then the number of electrons transferred in each case is respectively.
4, 3, 1, 5
1, 5, 3, 7
1, 3, 4, 5
3, 5, 7, 1
Correct Answer
Detailed Explanation
The oxidation numbers of manganese (Mn) in various compounds reflect its varying oxidation states, with KMnO₄ having Mn at +7, MnO₄²⁻ at +6, MnO₂ at +4, Mn₂O₃ at +3, and Mn²⁺ at +2. The differences in oxidation states between these compounds are 1 (from +7 to +6), 3 (from +6 to +4), 4 (from +4 to +3), and 5 (from +3 to +2), which illustrates the progressive reduction of Mn. Since option C accurately summarizes these differences, it is the correct choice, while the other options are not applicable or do not provide relevant information. Understanding these oxidation states is crucial for grasping redox reactions and the behavior of transition metals in various chemical environments.
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