Lead is soluble in

Options

A. `CH_(3)COOH`
B. `H_(2)SO_(4)`
C. HCl
D. `HNO_(3)`

Explanation

To determine the solubility of lead, we can analyze the options provided and identify the correct solvent. Here’s a step-by-step solution:

### Step 1: Understand the Solubility of Lead
Lead (Pb) is a heavy metal that can react with various acids. Its solubility can vary based on the concentration of the acid used.

### Step 2: Analyze the Given Options
The options provided are:
1. STK acid (possibly a typo or misinterpretation)
2. S2 (not a recognizable acid)
3. SCL (likely referring to hydrochloric acid, HCl)
4. HNL3 (which refers to nitric acid, HNO3)

### Step 3: Evaluate the Solubility in Each Acid
- **STK Acid**: Not a recognized acid, so we cannot evaluate this option.
- **S2**: Not a recognized acid, so we cannot evaluate this option.
- **HCl (SCL)**: Lead does react with hydrochloric acid, but it forms lead(II) chloride, which is not very soluble in water.
- **HNO3 (HNL3)**: Lead is soluble in dilute nitric acid. When lead reacts with dilute nitric acid, it forms lead(II) nitrate, which is soluble in water.

### Step 4: Conclusion
Based on the evaluation, lead is soluble in dilute nitric acid (HNO3). However, it becomes passive in concentrated nitric acid, meaning it does not dissolve easily in that concentration.

### Final Answer
Lead is soluble in dilute nitric acid (HNO3).

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