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BUMHS MDCAT 2025 Chemistry #Electrochemistry #Oxidation Number Method

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NO₂⁻ → NO₃⁻ + ne⁻. Value of "n" by the oxidation number method is: (BUMHS MDCAT 2025)

Verified Answer & Explanation⌄

Correct Answer: B) 2

Concept Explanation

Nitrogen changes from +3 in NO₂⁻ to +5 in NO₃⁻, an increase of 2, so two electrons are released.

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