Redox Reaction


 
 
Concept Explanation
 

Redox Reaction

Oxidation Reaction:

It can be defined as:

The process in which oxygen is added to a substance.

                 Or

The process in which a substance loses electron(s).

               Or

The process in which a substance loses electron(s).

e.g.    (i);2Cu+O_{2}overset{Heat}{rightarrow}2CuO

            Copper  +  Oxygen   rightarrow  Copper oxide

    (ii);2H_{2}S+O_{2}rightarrow 2S+2H_{2}O

     Hydrogen + Oxygen rightarrow   Suphur  + Hydrogen oxide

         Sulphide

(iii);Znrightarrow Zn^{2+}+2e^{-}

         Zinc

Reduction Reaction:

It is defined as:

The process in which oxygen is removed from a substance.

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Sample Questions
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Question : 1

The reaction in which hydrogen is added to a substance is known as _______________________.

Right Option : A
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Question : 2

The substance which oxidizes ______________________ is known as an oxidizing agent.

Right Option : C
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Question : 3

Which of the following are correct :

(a) The process in which oxygen is added to a substance is known as reduction.

(b) The process in which a substance loses electron(s) is known as oxidation.

(c) The process in which a substance loses electron(s) is called oxidation.

Right Option : B
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