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प्रश्न
Describe briefly the ionic concept of oxidation and reduction. Give an equation to illustrate.
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उत्तर
In the electronic concept, oxidation is a process in which an atom or ion loses an electron(s).
Zn → Zn2+ + 2e-
Oxidation is also defined as a chemical process which involves
Addition of oxygen
Addition of electronegative ion
Removal of hydrogen
Removal of electropositive ion (element)
In the electronic concept, reduction is a process in which an atom or ion gains electrons.
Cu2+ + 2e-→ Cu
The reduction is also defined as a chemical process which involves
Removal of oxygen
Addition of electropositive ion
Addition of hydrogen
Removal of electronegative ion
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संबंधित प्रश्न
Identify in the following reaction (a) the substance oxidised, and (b) the substance reduced:
\[\ce{ZnO + C -> Zn + CO}\]
Identify the component oxidised in the following reaction:
\[\ce{H2S + Cl2 -> S + 2HCl}\]
When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name
- substance oxidised, and
- substance reduced.
Define the following in terms of gain or loss of hydrogen with one example:
Reduction
Electrolysis is a redox process. Explain.
Give the general group study of hydrogen with reference to
burning
Complete and balance the following equation:
Zn +_________________→ZnCl2 + H2
Explain the term redox reaction with an example involving the reaction of hydrogen sulphide with chlorine.
Give two tests for a reducing agent.
Identify the following reactions as oxidation or reduction
- Na → Na+ + e
- Fe3+ + 2 e- → Fe+
