Answers

2016-02-17T19:32:46+05:30
 The reaction in which a substance gains oxygen or loses hydrogen is called an oxidation reaction. For example, when copper (Cu) is heated in the presence of air, it gets oxidised to form copper oxide (CuO). The chemical equation involved in this reaction can be represented as Since heat energy is absorbed in this process, this reaction is endothermic nature. 
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