Dilute sulphuric acid will produce a white precipitate when added to a solution of: 
Copper sulphate ; Sodium nitrate : Zinc nitrate : Lead nitrate

Options

A. Copper sulphate
B. Sodium nitrate
C. Zinc nitrate
D. Lead nitrate

Answer

To determine which solution will produce a white precipitate when dilute sulfuric acid (H₂SO₄) is added, we will analyze each option provided: Copper sulfate (CuSO₄), Sodium nitrate (NaNO₃), Zinc nitrate (Zn(NO₃)₂), and Lead nitrate (Pb(NO₃)₂).

### Step-by-Step Solution:

1. **Copper Sulfate (CuSO₄)**:
- When dilute sulfuric acid is added to copper sulfate, no reaction occurs because both contain sulfate ions (SO₄²⁻). The sulfate ions do not precipitate further, and thus no white precipitate is formed.
- **Conclusion**: No white precipitate.

2. **Sodium Nitrate (NaNO₃)**:
- When dilute sulfuric acid reacts with sodium nitrate, a double displacement reaction occurs, producing nitric acid (HNO₃) and sodium sulfate (Na₂SO₄).
- The sodium sulfate formed is soluble in water, so no precipitate is formed.
- **Conclusion**: No white precipitate.

3. **Zinc Nitrate (Zn(NO₃)₂)**:
- When dilute sulfuric acid is added to zinc nitrate, another double displacement reaction occurs, resulting in the formation of zinc sulfate (ZnSO₄) and nitric acid (HNO₃).
- Zinc sulfate is also soluble in water, which means no precipitate is formed.
- **Conclusion**: No white precipitate.

4. **Lead Nitrate (Pb(NO₃)₂)**:
- When dilute sulfuric acid is added to lead nitrate, a double displacement reaction occurs, producing lead sulfate (PbSO₄) and nitric acid (HNO₃).
- Lead sulfate is insoluble in water and forms a white precipitate.
- **Conclusion**: A white precipitate is formed.

### Final Answer:
The solution that produces a white precipitate when dilute sulfuric acid is added is **Lead Nitrate (Pb(NO₃)₂)**.

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