Question

Identify the substance that are oxidized and substance that are reduced in the following reaction
1.4Na+ o2-------2Na2o
2. Cuo+ H2---------ci+h2o
b. State the kind of chemical reaction in the following example
a. Digestion of food in stomach b. Composition of coal in air

Answer 1

Answer:

Na is oxidised and O2 is reduced

CuO is reduced and H2 is oxidised

Redox reaction.

Answer 2

Explanation:

Na = oxidized , o2 = reduced

Cu = reduced , H2 = oxidized

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