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Question

(i) Explain the following in terms of gain or loss of oxygen:

(a) Oxidation
(b) Reduction

(ii) In the reaction:

3MnO2+4Al3Mn+2Al2O3
(a) Name the substance oxidised
(b) Name the substance reduced
(c) Name the oxidizing agent
(d) Name the reducing agent

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Solution

(i) (a) Oxidation: Oxidation is a chemical reaction in which a substance gains oxygen or an electronegative element.

(b) Reduction: Reduction is a chemical reaction in which a loss of oxygen or electronegative radical takes place.

(ii)(a)Al
(b) MnO2
(c) MnO2
(d)Al

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