The colloidal sol of `As_(2)S_(3)` prefers to adsorb

Options

A. `NO_(3)^(Θ)`
B. `K^(o+)`
C. `S^(2-)`
D. `H^(o+)`

Answer

To solve the question regarding the colloidal sol of \( As_2S_3 \) and its preference for adsorption, we can follow these steps:

### Step 1: Identify the components of \( As_2S_3 \)
The colloidal sol of arsenic sulfide (\( As_2S_3 \)) consists of two types of ions:
- Arsenic ions: \( As^{3+} \)
- Sulfide ions: \( S^{2-} \)

### Step 2: Understand the concept of preferential adsorption
In colloidal systems, there is a phenomenon known as preferential adsorption, where the colloidal particles tend to adsorb ions that are common to their composition. This means that the colloidal sol will preferentially adsorb either the cation or the anion that is present in its structure.

### Step 3: Analyze the options for common ions
Given the nature of \( As_2S_3 \), we need to determine which ions are present in the options provided. The colloidal sol will preferentially adsorb:
- \( As^{3+} \) (cation)
- \( S^{2-} \) (anion)

### Step 4: Identify the common ion from the options
Among the options provided in the question, we need to identify which ion is common to \( As_2S_3 \). The common ions are:
- If an option includes \( As^{3+} \), it is a common cation.
- If an option includes \( S^{2-} \), it is a common anion.

### Step 5: Select the correct answer
Upon reviewing the options, we find that the sulfide ion \( S^{2-} \) is the common ion present in the colloidal sol of \( As_2S_3 \). Therefore, the colloidal sol of \( As_2S_3 \) will preferentially adsorb the sulfide ion.

### Final Answer
The colloidal sol of \( As_2S_3 \) prefers to adsorb the sulfide ion \( S^{2-} \).

---