which of the following statements is not correct about the reaction given below?
`K_(4)[Fe(CN)_(6)]overset("Oxidation")rarrFe^(3+)+CO_(2)+NO_(3)^(ө)`

Options

A. Fe is oxidised from `Fe^(2+)` to `Fe^(3+)`.
B. Carbon is oxidised from `C^(2+)` to `C^(4+)`.
C. N is oxidised from `N^(3-)` to `N^(5+)`.
D. Carbon is not oxidised.

Explanation

To determine which statement is not correct about the given reaction \( K_4[Fe(CN)_6] \) undergoing oxidation to produce \( Fe^{3+} + CO_2 + NO_3^- \), we can analyze the oxidation states of the elements involved, particularly focusing on carbon in the cyanide complex.

### Step-by-step Solution:

1. **Identify the oxidation state of carbon in \( K_4[Fe(CN)_6] \)**:
- The cyanide ion \( CN^- \) consists of carbon (C) and nitrogen (N).
- The oxidation state of nitrogen in \( CN^- \) is \(-3\).
- Let the oxidation state of carbon be \( x \). The equation for the oxidation state of the cyanide ion can be set up as:
\[ x + (-3) = -1 \]
- Solving for \( x \):
\[ x - 3 = -1 \implies x = +2 \]
- Therefore, the oxidation state of carbon in \( K_4[Fe(CN)_6] \) is \( +2 \).

2. **Determine the oxidation state of carbon in \( CO_2 \)**:
- In carbon dioxide \( CO_2 \), the oxidation state of carbon can be calculated as follows:
\[ x + 2(-2) = 0 \]
- Solving for \( x \):
\[ x - 4 = 0 \implies x = +4 \]
- Therefore, the oxidation state of carbon in \( CO_2 \) is \( +4 \).

3. **Calculate the change in oxidation state of carbon**:
- The change in oxidation state of carbon from \( K_4[Fe(CN)_6] \) to \( CO_2 \) is:
\[ +2 \text{ (in } K_4[Fe(CN)_6]) \text{ to } +4 \text{ (in } CO_2) \]
- The change is:
\[ +4 - (+2) = +2 \]
- This indicates that carbon is oxidized from \( +2 \) to \( +4 \).

4. **Conclusion**:
- Since carbon is indeed oxidized from \( +2 \) to \( +4 \), any statement claiming that carbon is not oxidized would be incorrect.
- Therefore, the statement "Carbon is not oxidized" is the one that is not correct.

### Final Answer:
The statement that is not correct about the reaction is: **"Carbon is not oxidized."**