Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is

Options

A. `Na_(2)O`
B. `Na_(2)O_(2)`
C. `Li_(2)O`
D. `KO_(2)`.

Explanation

To solve the question, we need to identify which compound, when hydrolyzed, produces a metallic hydroxide, hydrogen peroxide, and oxygen. Let's break down the steps:

### Step 1: Understand Hydrolysis
Hydrolysis is a chemical reaction involving water that leads to the breakdown of a compound. In this case, we are looking for a compound that, when hydrolyzed, produces a metallic hydroxide (MOH), hydrogen peroxide (H2O2), and oxygen (O2).

### Step 2: Identify the Compounds
The question suggests that one of the compounds is a superoxide. Superoxides are compounds that contain the superoxide ion (O2^-). Common alkali metal superoxides include potassium superoxide (KO2).

### Step 3: Write the Hydrolysis Reaction
When potassium superoxide (KO2) undergoes hydrolysis, the reaction can be represented as follows:
\[ 4 KO_2 + 2 H_2O \rightarrow 4 KOH + 2 H_2O_2 + O_2 \]
This reaction shows that potassium superoxide reacts with water to produce potassium hydroxide (KOH), hydrogen peroxide (H2O2), and oxygen gas (O2).

### Step 4: Conclusion
From the reaction, we can see that the compound that gets hydrolyzed to form metallic hydroxide (KOH), hydrogen peroxide (H2O2), and oxygen (O2) is potassium superoxide (KO2).

### Final Answer
The compound that gets hydrolyzed to form metallic hydroxide, hydrogen peroxide, and oxygen is **potassium superoxide (KO2)**.

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