The oxidation state of nickel in `[Ni(CO)_(4)]` is

Options

A. 4
B. 0
C. 2
D. 3

Answer

To determine the oxidation state of nickel in the complex `[Ni(CO)4]`, we can follow these steps:

### Step 1: Identify the components of the complex
The complex consists of nickel (Ni) as the central metal atom and carbon monoxide (CO) as the ligand.

### Step 2: Determine the charge of the ligands
Carbon monoxide (CO) is a neutral ligand. This means it does not contribute any charge to the overall complex.

### Step 3: Set up the equation for oxidation state
Let the oxidation state of nickel be represented as \( x \). Since there are four CO ligands, and each CO is neutral, the total contribution from the ligands is 0. The overall charge of the complex is also neutral (0).

Thus, we can set up the equation:
\[ x + (0) = 0 \]

### Step 4: Solve for the oxidation state of nickel
From the equation:
\[ x = 0 \]

### Conclusion
The oxidation state of nickel in the complex `[Ni(CO)4]` is 0.

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