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Question

Which of the following is a redox reaction?



A

CaO + 

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B

+   2HCl

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C

CaO + 2HCl    +

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D

CaO + 2HCl  +

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Solution

The correct option is B

+   2HCl


H2 + Cl2  2HCl is an example of Redox reaction. Here the oxidation state of  H2 changes from 0 to +1 whereas the oxidation state of Cl2 is reduced from 0 to -1​ in HCl.


Chemistry

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