When hydrolith is treated with water it yields

Options

A. `H_(2)`
B. `H_(2)O_(2)`
C. NaH
D. `N_(2)`

Answer

To solve the question "When hydrolith is treated with water, it yields," we need to identify what hydrolith is and what happens when it reacts with water.

### Step-by-Step Solution:

1. **Identify Hydrolith**:
- Hydrolith is another name for calcium hydride (CaH₂). It is a compound that reacts with water.

2. **Write the Reaction**:
- When calcium hydride is treated with water, the chemical reaction can be represented as:
\[ \text{CaH}_2 + 2\text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2 + \text{H}_2 \]
- In this reaction, calcium hydride reacts with water to produce calcium hydroxide (Ca(OH)₂) and hydrogen gas (H₂).

3. **Balance the Reaction**:
- The equation is balanced as written. We have 1 calcium atom, 2 hydrogen atoms from CaH₂, and 2 hydrogen atoms from 2 water molecules, giving a total of 4 hydrogen atoms on the reactant side. On the product side, we have 2 hydrogen atoms in calcium hydroxide and 2 in hydrogen gas, which also totals 4.

4. **Identify the Products**:
- From the balanced equation, we see that the products of the reaction are calcium hydroxide and hydrogen gas.

5. **Select the Correct Option**:
- Among the given options (hydrogen, hydrogen peroxide, sodium hydride, nitrogen), the correct product formed when hydrolith (calcium hydride) is treated with water is hydrogen gas.

### Conclusion:
The correct answer is **hydrogen**.