Which reaction is possible at anode?

Options

A. `2Cr^(3+) + 7H_2O to Cr_2O_7^(2-) + 14H^+`
B. `O_2 + 4H^+ to 2 H_2O`
C. `F_2 to 2F^-`
D. None of these

Explanation

To determine which reaction is possible at the anode, we need to understand that the anode is where oxidation occurs. Oxidation is defined as the loss of electrons, which results in an increase in the oxidation state of the species involved. Let's analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding Oxidation at the Anode:**
- At the anode, oxidation occurs, meaning that the species will lose electrons and its oxidation state will increase.

2. **Analyzing Option A:**
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