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Question
Which reaction is not a redox reaction?
Options
\[\ce{H2 + Cl2 -> 2HCl}\]
\[\ce{BaCl2 + Na2SO4 -> BaSO4 + 2NaCl}\]
\[\ce{Zn + CuSO4 -> ZnSO4 + Cu}\]
\[\ce{2KClO3 + I2 -> 2KIO3 + Cl2}\]
MCQ
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Solution
\[\ce{BaCl2 + Na2SO4 -> BaSO4 + 2NaCl}\]
Explanation:
A redox reaction is one in which reduction as well as oxidation take place simultaneously.
In the reaction:
\[\ce{BaCl2 + Na2SO4 -> BaSO4 + 2NaCl}\]
The oxidation numbers of all elements in the reactants and products are the same; therefore, oxidation and reduction do not occur, and it is not a redox reaction.
shaalaa.com
Classical Idea of Redox Reactions - Oxidation and Reduction Reactions
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