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Carbon has the maximum oxidation state of +4, therefore carbon dioxide (CO2) cannot act as a reducing agent.

1. Higher the value of reduction potential, higher will be the oxidising power whereas the lower the value of reduction potential higher will be the reducing power.
2. Carbon has the maximum oxidation state of +4, therefore carbon dioxide (CO2) cannot act as a reducing agent.
3. F2 is the strongest oxidising agent as it has highest reduction potential while I− is the strongest reducing agent since it has the lowest reduction potential.
4. Reducing power: K > Al > Cr > Ag

Correct answer: Carbon has the maximum oxidation state of +4, therefore carbon dioxide (CO2) cannot act as a reducing agent.

Solution

The statement in option B is correct because carbon in CO2 is already in its maximum oxidation state of +4, so it cannot lose more electrons to act as a reducing agent.

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