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Question

All of the following are redox reactions, except

A

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B
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C
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D
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Solution

The correct option is C
The reactions in which oxidation and reduction take place simultaneously and there is a change in oxidation number of elements in reactants and products are called redox reactions.


In the reaction, oxidation states of Ca, C, and O remain the same in reactants as well as products, therefore, it is not a redox reaction.

Hence, the correct answer is option (c).

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