Which reaction involves the removal of an electropositive element as oxidation?

Practice question

Question

Which reaction involves the removal of an electropositive element as oxidation?

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2Mg + Oâ‚‚ -> 2MgO 2Kâ‚„[Fe(CN)6] + Hâ‚‚Oâ‚‚ -> 2Kâ‚ƒ[Fe(CN)6] + 2KOH Correct 2HgO -> 2Hg + Oâ‚‚ Zn + CuSOâ‚„ -> ZnSOâ‚„ + Cu

Explanation

In 2Kâ‚„[Fe(CN)6] + Hâ‚‚Oâ‚‚ -> 2Kâ‚ƒ[Fe(CN)6] + 2KOH, K is removed from Kâ‚„[Fe(CN)6], and Fe (+2 to +3) is oxidized. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

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