State as oxidation or reduction in the given reaction: $K - e^{-} \to K^{+}$

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Solution

Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.
Here,
K atom is loosing one electron and forms cation so its a oxidation process.

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F e^{3 +} + e^{-} \to F e^{2 +}

O + 2 e^{-} \to O^{2 -}

K - e^{-} \to K^{+}

Identify the following reactions as oxidation or reduction reaction:
i) $K - e^{-} \to K^{+}$
ii) $F e^{3 +} + e^{-} \to F e^{2 +}$

Identify the following reactions as either oxidation or reduction :

(i) $O + 2 e^{-} \to O^{2 -}$ (ii) $K - e^{-} \to K^{+}$ (iii) $F e^{3 +} + e^{-} \to F e^{2 +}$

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