Yellow ammonium sulphide (YAS) can be used to seprate SnS and `As_(2)S_(3)`. (T/F)

Explanation

To determine whether the statement "Yellow ammonium sulphide (YAS) can be used to separate SnS and As₂S₃" is true or false, we can analyze the properties of these compounds and their reactions with yellow ammonium sulfide.

### Step-by-Step Solution:

1. **Understanding Yellow Ammonium Sulfide (YAS)**:
- Yellow ammonium sulfide is represented as (NH₄)₂S₂. It is a reagent used in qualitative analysis.

2. **Identifying the Compounds**:
- SnS (Tin(II) sulfide) and As₂S₃ (Arsenic trisulfide) are both sulfides of group 2B elements.

3. **Reactions with Yellow Ammonium Sulfide**:
- When SnS reacts with yellow ammonium sulfide, it forms a soluble complex:
\[ \text{SnS} + (NH₄)₂S₂ \rightarrow (NH₄)₂[SnS₃] \]
- Similarly, As₂S₃ also reacts with yellow ammonium sulfide:
\[ \text{As}_2\text{S}_3 + (NH₄)₂S₂ \rightarrow (NH₄)_2[AsS₄] \]

4. **Solubility of the Products**:
- Both SnS and As₂S₃ react with yellow ammonium sulfide to form soluble thiosalts. This means that both compounds dissolve in the presence of yellow ammonium sulfide.

5. **Conclusion**:
- Since both SnS and As₂S₃ are soluble in yellow ammonium sulfide, they cannot be separated using this reagent. Therefore, the statement is **false**.

### Final Answer:
The statement "Yellow ammonium sulphide (YAS) can be used to separate SnS and As₂S₃" is **False**.

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