In which of the following reactions does hydr | vedclass

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(C) An oxidizing agent is a substance that gains electrons or causes the oxidation of another substance. In the reaction with metals,hydrogen acts as

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Sodium

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(C) An oxidizing agent is a substance that gains electrons or causes the oxidation of another substance. In the reaction with metals,hydrogen acts as an oxidizing agent because it gains electrons to form hydride ions $(H^-)$.For example,the reaction with sodium is: $2Na + H_2 \rightarrow 2NaH$.In this reaction,sodium $(Na)$ is oxidized to $Na^+$,and hydrogen $(H_2)$ is reduced to $H^-$,thus acting as an oxidizing agent.

In which of the following reactions does hydrogen act as an oxidizing agent?

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