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प्रश्न
Is it essential that oxidation and reduction must occur side by side in a chemical reaction? Explain
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उत्तर
In a chemical reaction, if one substance is oxidised, the other substance must necessarily be reduced. This is because the electrons lost during oxidation are simultaneously gained during reduction and vice versa.
For example, Zinc reacts with copper sulphate to form zinc sulphate and copper.
CuSO4 + Zn → ZnSO4 + Cu
Cu + 2SO42- + Zn →Zn + 2SO42- + Cu
Writing the half reaction,
Zn → Zn2+ + 2e- (Oxidation)
Cu2+ + 2e-→ Cu (Reduction)
They occur simultaneously as
Cu2+ + Zn→ Zn2++ Cu
Thus, oxidation and reduction always occur simultaneously.
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संबंधित प्रश्न
When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
Indicate which of the following statement is true and which is false:
The removal of hydrogen from a substance is called reduction.
Define reduction.
Explain the following in term of gain or loss of oxygen with two examples.
Reduction
Name:
an oxidizing agent that does not contain oxygen.
Complete and balance the following equation:
\[\ce{K + H2O -> }\]________+ ________
Oxidising agents are also called as ______ because they remove electrons form other substances.
Identify the reducing agent in the following reactions
`4"NH"_3 + 5"O"_2 -> 4"NO" + 6"H"_2"O"`
Identify the reducing agent in the following reactions
`2"H"_2 + "O"_2 -> 2"H"_2"O"`
During the reaction of some metals with dilute hydrochloric acid, following observations are made.
Silver metal does not show any change
Explain this observation giving suitable reason.
