Question

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explain following terma in terms of gain or loss of oxygen with two examples each

oxidation, reduction ​

Answer 1

Answer:

Copper is oxidized to become copper oxide by gaining of oxygen. (2) Magnesium is oxidized to become magnesium oxide by gaining of oxygen. Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases.

Explanation:

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Answer 2

Answer :

a. Oxidation ( in terms of oxygen transfer):-

• Oxidation is simply defined as the process of adding oxygen to a substance. In other words, oxidation is a process which involves gain of oxygen by a reactant. Such a reactant which has gained oxygen is said to be oxidised.

Reactions (2):-

• $\rm{2Mg(s)+O_2(g)\xrightarrow{\text{Heat}}2MgO(s)}$

— In this reaction, Mg is gaining oxygen to form MgO. Hence, Mg is oxidised to MgO.

• $\rm{2Cu(s)+O_2(g)\xrightarrow{\text{Heat}}2CuO(s)}$

— In this reaction, Cu is gaining oxygen to form CuO. Hence, Cu is oxidised to CuO.

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b. Reduction (in terms of oxygen transfer):-

• Reduction is simply defined as the process of losing oxygen from a substance. In other words, reduction is a process which involves the loss of oxygen from a reactant. Such a reactant that has lost oxygen is said to be reduced.

Reactions (2):-

• $\rm{CuO+H_2\xrightarrow{\text{Heat}}Cu+H_2O}$

— In this reaction, CuO is losing oxygen to form Cu. Hence, CuO is being reduced to Cu.

• $\rm{ZnO+C\xrightarrow{\text{Heat}}Zn+CO}$

— In this reaction, ZnO is losing oxygen to form Zn. Hence, ZnO is reduced to Zn.