Which of the following is/are soluble in ethanol

Options

A. `HgF_(2)`
B. `HgCl_(2)`
C. `HgBr_(2)`
D. `HgI_(2)`

Explanation

To determine which of the given compounds are soluble in ethanol, we can follow these steps:

### Step 1: Understand the Composition of Ethanol
Ethanol (C2H5OH) contains a hydroxyl group (-OH), which allows it to engage in hydrogen bonding. This property is crucial for solubility in polar solvents like ethanol.

**Hint:** Remember that solubility often depends on the ability of a substance to form hydrogen bonds with the solvent.

### Step 2: Analyze Each Compound
We need to evaluate the solubility of each compound in ethanol based on their ability to form hydrogen bonds with the hydroxyl group in ethanol.

1. **HgI2 (Mercury(II) Iodide)**:
- HgI2 has a low capacity for hydrogen bonding due to its molecular structure.
- Therefore, it is **not soluble** in ethanol.

2. **HgCl2 (Mercury(II) Chloride)**:
- HgCl2 can interact with the hydroxyl group in ethanol and can form hydrogen bonds.
- Thus, it is **soluble** in ethanol.

3. **HgBr2 (Mercury(II) Bromide)**:
- Similar to HgCl2, HgBr2 can also form hydrogen bonds with ethanol.
- Hence, it is **soluble** in ethanol.

4. **HgF2 (Mercury(II) Fluoride)**:
- HgF2 has a strong capacity to form hydrogen bonds due to the electronegativity of fluorine.
- Therefore, it is **soluble** in ethanol.

### Step 3: Conclusion
Based on the analysis:
- **Soluble in ethanol:** HgCl2, HgBr2, HgF2
- **Not soluble in ethanol:** HgI2

Thus, the compounds that are soluble in ethanol are **HgCl2, HgBr2, and HgF2**.

**Final Answer:** HgCl2, HgBr2, and HgF2 are soluble in ethanol.

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