The oxidation of central atom in the complex ` [ Co(NH_(3))_(4) CINO_(2)]` is

Options

A. ` +2`
B. `+3`
C. `+1`
D. zero

Answer

To determine the oxidation state of the central atom (cobalt) in the complex \([Co(NH_3)_4ClNO_2]\), we can follow these steps:

### Step 1: Identify the ligands and their charges
- The complex contains:
- 4 ammonia (NH₃) ligands, which are neutral (charge = 0).
- 1 chloro (Cl) ligand, which has a charge of -1.
- 1 nitro (NO₂) ligand, which typically has a charge of -1.

### Step 2: Set up the equation for the oxidation state
Let the oxidation state of cobalt be \(X\). The overall charge of the complex is neutral (0), so we can set up the equation as follows:

\[ X + (4 \times 0) + (-1) + (-1) = 0 \]

### Step 3: Simplify the equation
This simplifies to:

\[ X - 2 = 0 \]

### Step 4: Solve for \(X\)
Now, we can solve for \(X\):

\[ X = 2 \]

### Conclusion
The oxidation state of cobalt in the complex \([Co(NH_3)_4ClNO_2]\) is \(+2\).