When `SO_(2)` is bubbled into `H_(2)S` gas, colloidal sol is formed. What type of colloidal sol is it ?

Options

A. Lyophillic sol of sulphur is formed
B. Lyophobic sol of sulphur is formed
C. Suspension of water and sulphur is formed
D. A true solution of suiphur in water is formed

Answer

To determine the type of colloidal sol formed when \( SO_2 \) is bubbled into \( H_2S \) gas, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction**:
When \( SO_2 \) is bubbled into \( H_2S \), a chemical reaction occurs. The balanced equation for this reaction is:
\[ 2 H_2S + SO_2 \rightarrow 2 H_2O + 3 S \]
This indicates that sulfur is produced along with water.

**Hint**: Look for the products formed from the reaction of the two gases.

2. **Understand the Nature of the Colloidal Sol**:
The sulfur produced in the reaction can form a colloidal sol. Colloidal sols can be categorized into two types: lyophilic and lyophobic.

- **Lyophilic Sols**: These are solvent-loving and can easily form stable colloidal solutions by absorbing the solvent.
- **Lyophobic Sols**: These are solvent-fearing and do not easily mix with the solvent, leading to unstable colloidal solutions.

**Hint**: Recall the definitions of lyophilic and lyophobic sols to classify the type of sol formed.

3. **Analyze the Characteristics of the Colloidal Sol**:
In this case, the sulfur produced is not readily soluble in water. Instead, it forms a colloidal suspension that does not easily disperse in the solvent. This behavior is characteristic of a lyophobic sol.

**Hint**: Consider the solubility of sulfur in water and how it behaves when formed in a colloidal state.

4. **Conclusion**:
Based on the reaction and the nature of the sol formed, we conclude that the type of colloidal sol formed when \( SO_2 \) is bubbled into \( H_2S \) is a **lyophobic sol of sulfur**.

**Hint**: Summarize the findings to arrive at the final answer.

### Final Answer:
The type of colloidal sol formed is a **lyophobic sol of sulfur**.