Explain the following in terms of gain or loss of oxygen with two exam

1.	Explain the following in terms of gain or loss of oxygen with two examples each:(a) Oxidation (6) Reduction.
Answer» (a) Oxidation: It is defined as a process which involves gain of oxygen. For example, (i) 2Mg(s) + O₂(g) -----> 2MgO(s) Magnesium Oxygen Magnesium oxide Here, Mg has gained oxygen to form MgO. Hence, Mg has been oxidised to MgO. (ii) 2Cu(s) + O₂(g) Heat -----> 2CuO(s) Copper Oxygen Copper oxide In this reaction, Cu has gained oxygen to form CuO. Thus, Cu is oxidised to copper oxide (CuO). (b) Reduction: It is defined as the process which involves loss of oxygen. For example, (i) Cuo + H₂ +Heat ------> Cu + H₂O Copper oxide Hydrogen Copper Water In this reaction, copper oxide is losing oxygen. So, it is being reduced to copper.

Explain the following in terms of gain or loss of oxygen with two examples each:(a) Oxidation (6) Reduction.

Answer»

(a) Oxidation: It is defined as a process which involves gain of oxygen. For example,
(i) 2Mg(s) + O₂(g) -----> 2MgO(s)
Magnesium Oxygen Magnesium oxide

Here, Mg has gained oxygen to form MgO. Hence, Mg has been oxidised to MgO.
(ii) 2Cu(s) + O₂(g) Heat -----> 2CuO(s)
Copper Oxygen Copper oxide
In this reaction, Cu has gained oxygen to form CuO. Thus, Cu is oxidised to copper oxide (CuO).
(b) Reduction: It is defined as the process which involves loss of oxygen. For example,
(i) Cuo + H₂ +Heat ------> Cu + H₂O
Copper oxide Hydrogen Copper Water
In this reaction, copper oxide is losing oxygen. So, it is being reduced to copper.

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