Calculate oxidation no. in given coordination compound. `Ni(CO)_4`.

Answer

To calculate the oxidation number of nickel (Ni) in the coordination compound Ni(CO)₄, follow these steps:

### Step-by-Step Solution:

1. **Identify the Coordination Compound**: The given compound is Ni(CO)₄. Here, Ni is the central metal atom and CO is the ligand.

2. **Determine the Oxidation State of CO**: Carbon monoxide (CO) is a neutral ligand. This means that the oxidation state of CO is 0.

3. **Set Up the Equation**: The overall charge of the coordination compound Ni(CO)₄ is neutral, which means it is 0. We can express this mathematically:
\[ \text{Oxidation number of Ni} + 4 \times (\text{Oxidation number of CO}) = 0 \]
Since the oxidation number of CO is 0, we can substitute:
\[ \text{Oxidation number of Ni} + 4 \times 0 = 0 \]

4. **Solve for the Oxidation Number of Ni**: This simplifies to:
\[ \text{Oxidation number of Ni} = 0 \]

5. **Conclusion**: Therefore, the oxidation number of nickel (Ni) in Ni(CO)₄ is 0.

### Final Answer:
The oxidation number of Ni in Ni(CO)₄ is 0.

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