Which one of the following on hydrolysis, gives the corresponding metallic hydroxide , `H_2O_2 and O_2` ?

Options

A. `Li_2O `
B. `Na_2O_2`
C. `NaO_2`
D. `Na_2O`

Explanation

To solve the question "Which one of the following on hydrolysis gives the corresponding metallic hydroxide, H2O2, and O2?", we will follow these steps:

### Step 1: Understand the Hydrolysis of Alkali Metal Compounds
Hydrolysis refers to the chemical reaction with water. In the case of alkali metals, we need to understand how their oxides, peroxides, and superoxides behave when they react with water.

**Hint:** Recall the types of oxides formed by alkali metals: normal oxides, peroxides, and superoxides.

### Step 2: Identify the Products of Hydrolysis
When alkali metal oxides are hydrolyzed, they typically produce metallic hydroxides. For example:
- Normal oxides (like Na2O) yield NaOH.
- Peroxides (like Na2O2) yield NaOH and H2O2.
- Superoxides (like NaO2) yield NaOH, H2O2, and O2.

**Hint:** Focus on the specific products formed from the hydrolysis of each type of oxide.

### Step 3: Analyze the Options
We need to determine which type of oxide will yield all three products: metallic hydroxide, H2O2, and O2.

**Hint:** Consider the characteristics of superoxides and their reactions with water.

### Step 4: Write the Reaction for Superoxide
For sodium superoxide (NaO2), the hydrolysis reaction can be written as:
\[ \text{2 NaO}_2 + 2 \text{H}_2\text{O} \rightarrow 2 \text{NaOH} + \text{H}_2\text{O}_2 + \text{O}_2 \]

This shows that hydrolysis of sodium superoxide gives sodium hydroxide (NaOH), hydrogen peroxide (H2O2), and oxygen (O2).

**Hint:** Ensure that you can balance the chemical equation correctly.

### Step 5: Conclusion
Based on the analysis, the compound that gives the corresponding metallic hydroxide, H2O2, and O2 upon hydrolysis is sodium superoxide (NaO2).

**Final Answer:** The answer to the question is sodium superoxide (NaO2).