In which of the following processes the energy is not being absorbed? 

Options

A. `Na(g) to Na^(-)(g)`
B. `Na^(+)to  Na`
C. `A^(+)(g) + B^(-)g) to AB(s)`
D. `N(g) to N^(+) (g)`

Answer

To solve the question "In which of the following processes the energy is not being absorbed?", we need to identify the processes that release energy rather than absorb it. This is characteristic of exothermic processes. Let's analyze the options step by step:

### Step-by-Step Solution:

1. **Understanding Endothermic and Exothermic Processes**:
- **Endothermic Process**: A process that absorbs energy from the surroundings (e.g., melting ice).
- **Exothermic Process**: A process that releases energy to the surroundings (e.g., combustion).

2. **Analyzing the Given Processes**:
- **Process 1**: Sodium gaining an electron (Electron Affinity).
- When sodium gains an electron, energy is released. This is an exothermic process.

- **Process 2**: Sodium becoming positive (Ionization).
- This involves removing an electron from sodium, which requires energy. Thus, this is an endothermic process.

- **Process 3**: Formation of a compound from elements.
- The formation of a compound generally releases energy, making this an exothermic process.

- **Process 4**: Nitrogen becoming positive (Ionization).
- Similar to sodium, removing an electron from nitrogen requires energy, indicating that this is also an endothermic process.

3. **Conclusion**:
- From the analysis, processes 1 and 3 are exothermic (energy is released), while processes 2 and 4 are endothermic (energy is absorbed).
- Therefore, the processes in which energy is not being absorbed (exothermic) are **Process 1** (Sodium gaining an electron) and **Process 3** (Formation of a compound).

### Final Answer:
The processes in which energy is not being absorbed are **Process 1 and Process 3**.