Which compound is deliquescent-

Options

A. `ZnCl_(2)`
B. `Hg_(2)Cl_(2)`
C. `HgCl_(2)`
D. `CdCl_(2)`

Answer

To determine which compound is deliquescent, we need to understand what deliquescent compounds are and analyze the given options.

### Step-by-Step Solution:

1. **Definition of Deliquescent Compounds**:
- Deliquescent compounds are substances that can absorb moisture from the air and dissolve in the absorbed water to form a liquid solution. This typically occurs when the compound is hygroscopic, meaning it has a strong affinity for water.

2. **Analyzing the Given Options**:
- Let's consider the common compounds that are often tested for deliquescence. Some examples include:
- Sodium hydroxide (NaOH)
- Calcium chloride (CaCl2)
- Zinc chloride (ZnCl2)
- Potassium carbonate (K2CO3)

3. **Properties of Zinc Chloride (ZnCl2)**:
- Zinc chloride is known to be highly soluble in water and can absorb moisture from the atmosphere.
- When exposed to air, ZnCl2 can attract water vapor and dissolve in it, forming a solution.

4. **Conclusion**:
- Among the options, ZnCl2 is the compound that exhibits deliquescent behavior due to its ability to absorb moisture and dissolve in it. Therefore, the answer is **Zinc Chloride (ZnCl2)**.

### Final Answer:
The deliquescent compound is **Zinc Chloride (ZnCl2)**.

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