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Question

Determine which substance is oxidized and which substance is reduced in the following reactions:
CO2(g)+H2(g)CO(g)+H2O(g)


A

CO2 is oxidized, H2 is reduced

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B

CO2 is reduced, H2 is oxidized

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C

Both CO2 & H2 are reduced

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D

Both CO2 & H2 are oxidized

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Solution

The correct option is B

CO2 is reduced, H2 is oxidized


Here, CO2 is reduced when it reacts with hydrogen because it loses one oxygen atom and H2 is oxidized as it gains an oxygen atom.


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