`N_(2)+3H_(2) to NH_(3)`

Options

A. For disproportionation reaction.
B. For comproportionation reaction.
C. For either intermolecular redox reaction or displacement reaction
D. For either thermal combination redox reaction or thermal decomposition redox reaction.

Answer

To determine the type of reaction represented by the equation \( N_2 + 3H_2 \rightarrow 2NH_3 \), we will analyze the oxidation states of the elements involved and classify the reaction accordingly.

### Step-by-Step Solution:

1. **Write the Reaction**:
The given reaction is:
\[ N_2 + 3H_2 \rightarrow 2NH_3 \]

2. **Determine Oxidation States**:
- For \( N_2 \) (nitrogen gas), the oxidation state of nitrogen (N) is 0 because it is in its elemental form.
- For \( H_2 \) (hydrogen gas), the oxidation state of hydrogen (H) is also 0 for the same reason.
- In \( NH_3 \) (ammonia), the oxidation state of nitrogen is -3 and hydrogen is +1.

3. **Identify Changes in Oxidation States**:
- Nitrogen changes from 0 in \( N_2 \) to -3 in \( NH_3 \). This indicates a reduction (gain of electrons).
- Hydrogen changes from 0 in \( H_2 \) to +1 in \( NH_3 \). This indicates an oxidation (loss of electrons).

4. **Classify the Reaction**:
- Since there is a reduction of nitrogen and an oxidation of hydrogen, this reaction is classified as a **redox reaction** (reduction-oxidation reaction).
- Additionally, since two reactants combine to form a single product, this reaction is also classified as a **combination reaction**.

5. **Final Classification**:
- Therefore, the reaction \( N_2 + 3H_2 \rightarrow 2NH_3 \) is both a **redox reaction** and a **combination reaction**.

### Conclusion:
The reaction is classified as a redox combination reaction.