Identify the substance undergoing oxidation, the substance undergoing reduction, the oxidising agent and the reducing agent in each of the following reactions.
`Cr_(2)O_(7)^(2-)+6Fe^(2+)+14H^(+)to2Cr^(3+)+6Fe^(3+)+7H_(2)O`

Explanation

To identify the substances undergoing oxidation and reduction, as well as the oxidizing and reducing agents in the given reaction, we will follow these steps:

### Step 1: Write down the reaction
The reaction given is:
\[ \text{Cr}_2\text{O}_7^{2-} + 6\text{Fe}^{2+} + 14\text{H}^{+} \rightarrow 2\text{Cr}^{3+} + 6\text{Fe}^{3+} + 7\text{H}_2\text{O} \]

### Step 2: Assign oxidation states
- For \(\text{Cr}_2\text{O}_7^{2-}\):
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