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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
- substance oxidised, and
- substance reduced.
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
\[\ce{CuO_{(s)} + H2_{(g)} -> Cu_{(s)} + H2O_{(l)}}\]
In what respect does hydrogen differ from:
alkali metals
State whether the following conversion is oxidation or reduction:
2Cl- - e-→ Cl2
Reacting with water, an active metal produces
A metal oxide that is reduced by hydrogen is
Give two test for an oxidising agent.
Identify the oxidising agent (oxidant) in the following reactions
`"CuSO"_4 + "Zn" -> "Cu" + "ZnSO"_4`
Find the oxidation number of the element in the following compound.
Zn in ZnSO4
The metallic oxide which can be reduced by using common reducing agents is ______.
