One mole of calcium nitride on the reaction with an excess of water gives

Options

A. two moles of ammonia
B. two moles of nitric acid
C. one mole of ammonia
D. one mole of nitric acid

Answer

To solve the question regarding the reaction of calcium nitride with water, we will follow these steps:

### Step 1: Write the Chemical Formula for Calcium Nitride
Calcium nitride is represented by the chemical formula \( \text{Ca}_3\text{N}_2 \).

### Step 2: Write the Reaction with Water
When calcium nitride reacts with water, the reaction can be represented as:
\[ \text{Ca}_3\text{N}_2 + \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2 + \text{NH}_3 \]
However, we need to balance this reaction properly.

### Step 3: Balance the Reaction
To balance the reaction, we need to account for the number of calcium and nitrogen atoms. The balanced reaction is:
\[ \text{Ca}_3\text{N}_2 + 6 \text{H}_2\text{O} \rightarrow 3 \text{Ca(OH)}_2 + 2 \text{NH}_3 \]
This indicates that 1 mole of calcium nitride reacts with 6 moles of water to produce 3 moles of calcium hydroxide and 2 moles of ammonia.

### Step 4: Identify the Products
From the balanced equation, we see that the products of the reaction are:
- 3 moles of calcium hydroxide (\( \text{Ca(OH)}_2 \))
- 2 moles of ammonia (\( \text{NH}_3 \))

### Conclusion
Thus, the reaction of 1 mole of calcium nitride with excess water produces 2 moles of ammonia and 3 moles of calcium hydroxide.

### Final Answer
The correct answer to the question is that 1 mole of calcium nitride gives 2 moles of ammonia.

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