When `H_(2)S` gas is passed into a certain solution, it reacts to form a white precipitate. The solution referred to contains ions of

Options

A. Lead
B. Zinc
C. Copper
D. Nickel

Explanation

To determine which ions in the solution react with hydrogen sulfide (H₂S) to form a white precipitate, we can follow these steps:

### Step 1: Identify the nature of H₂S
H₂S is a weak acid and a source of sulfide ions (S²⁻) when it dissolves in water.

### Step 2: Understand the reaction with metal ions
When H₂S is passed into a solution containing metal ions, it can form precipitates with certain metal sulfides. The formation of a white precipitate indicates that the metal ions in the solution are likely to form insoluble sulfides.

### Step 3: Identify common metal ions that form white precipitates with sulfide
Common metal ions that form white precipitates with sulfide ions include:
- Lead (Pb²⁺) as lead(II) sulfide (PbS)
- Barium (Ba²⁺) as barium sulfide (BaS)
- Cadmium (Cd²⁺) as cadmium sulfide (CdS)

### Step 4: Determine the most likely candidate
Among these, lead(II) sulfide (PbS) is often noted for its characteristic white precipitate when H₂S is introduced into a solution containing lead ions.

### Conclusion
Thus, the solution referred to contains ions of **lead (Pb²⁺)**, which reacts with H₂S to form a white precipitate of lead(II) sulfide (PbS).

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