The compounds formed by the reaction of ammonia with chlorine and iodine are respectively

Options

A. `NCl_3 and NI_3`
B. `NCl_3 and NH_4I`
C. `NH_4Cl and NH_4I`
D. `NCl_3 and (NI_3.NH_3)`

Answer

To solve the question regarding the compounds formed by the reaction of ammonia with chlorine and iodine, we will analyze each reaction step-by-step.

### Step 1: Reaction of Ammonia with Chlorine
1. **Identify the Reactants**: The reactants are ammonia (NH₃) and chlorine (Cl₂).
2. **Reaction Conditions**: The reaction is typically carried out with excess chlorine.
3. **Products Formed**: When ammonia reacts with excess chlorine, it forms nitrogen trichloride (NCl₃) and hydrochloric acid (HCl).
- **Chemical Equation**:
\[ 3 \text{NH}_3 + 3 \text{Cl}_2 \rightarrow \text{NCl}_3 + 3 \text{HCl} \]
4. **Conclusion for Chlorine Reaction**: The compound formed is nitrogen trichloride (NCl₃).

### Step 2: Reaction of Ammonia with Iodine
1. **Identify the Reactants**: The reactants are ammonia (NH₃) and iodine (I₂).
2. **Reaction Conditions**: This reaction is generally performed at low temperatures initially.
3. **Products Formed**: At low temperatures, ammonia reacts with iodine to form nitrogen triiodide (NI₃) along with ammonia.
- **Chemical Equation**:
\[ 3 \text{NH}_3 + 3 \text{I}_2 \rightarrow \text{NI}_3 + 3 \text{NH}_3 \]
4. **Heating the Product**: Upon warming, nitrogen triiodide (NI₃) can decompose, releasing ammonia and forming a stable adduct (NI₃·NH₃) in dark conditions.
5. **Conclusion for Iodine Reaction**: The compound formed is nitrogen triiodide (NI₃) along with ammonia.

### Final Summary
- The compounds formed by the reaction of ammonia with chlorine and iodine are:
- **With Chlorine**: Nitrogen trichloride (NCl₃)
- **With Iodine**: Nitrogen triiodide (NI₃)

### Answer
The correct answer is option no. 4: Nitrogen trichloride (NCl₃) and nitrogen triiodide (NI₃).