The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is

Options

A. `N_(2)O`
B. NO
C. `NO_(2)`
D. `NH_(3)`

Answer

To solve the question regarding the nitrogen compound formed when `CaCN2` (calcium cyanamide) reacts with steam or hot water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactant in this case is calcium cyanamide, `CaCN2`, and it reacts with steam or hot water.

2. **Write the Reaction**: The general reaction of calcium cyanamide with water can be represented as:
\[ CaCN_2 + H_2O \rightarrow CaCO_3 + NH_3 \]
Here, calcium cyanamide reacts with water to produce calcium carbonate and ammonia.

3. **Identify the Products**: From the reaction, we see that the products are calcium carbonate (`CaCO3`) and ammonia (`NH3`).

4. **Focus on the Nitrogen Compound**: The question specifically asks for the nitrogen compound formed. In the reaction, the nitrogen compound produced is ammonia (`NH3`).

5. **Conclusion**: Therefore, the nitrogen compound formed when `CaCN2` reacts with steam or hot water is ammonia, `NH3`.

### Final Answer:
The nitrogen compound formed is **NH3** (Ammonia).