Which of the following gives a precipitate with `Pb(NO_(3))_(2)` but not with `Ba(NO_(3))_(2)` ?

Options

A. Sodium chloride
B. Sodium sulphate
C. Disodium hydrogen phosphate
D. Sodium chromate

Explanation

To solve the question of which compound gives a precipitate with \( Pb(NO_3)_2 \) but not with \( Ba(NO_3)_2 \), we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Compounds**: The options given are:
- Sodium Chloride (\( NaCl \))
- Sodium Sulfate (\( Na_2SO_4 \))
- Disodium Hydrogen Phosphate (\( Na_2HPO_4 \))
- Sodium Chromate (\( Na_2CrO_4 \))

2. **Reactions with Lead Nitrate**:
- **Sodium Chloride (\( NaCl \))**:
\[ 2 NaCl + Pb(NO_3)_2 \rightarrow 2 NaNO_3 + PbCl_2 \downarrow \]
\( PbCl_2 \) is a white precipitate.

- **Sodium Sulfate (\( Na_2SO_4 \))**:
\[ Na_2SO_4 + Pb(NO_3)_2 \rightarrow 2 NaNO_3 + PbSO_4 \downarrow \]
\( PbSO_4 \) is also a precipitate.

- **Disodium Hydrogen Phosphate (\( Na_2HPO_4 \))**:
\[ Na_2HPO_4 + Pb(NO_3)_2 \rightarrow 2 NaNO_3 + Pb_3(PO_4)_2 \downarrow \]
\( Pb_3(PO_4)_2 \) is a precipitate.

- **Sodium Chromate (\( Na_2CrO_4 \))**:
\[ Na_2CrO_4 + Pb(NO_3)_2 \rightarrow 2 NaNO_3 + PbCrO_4 \downarrow \]
\( PbCrO_4 \) is a precipitate.

3. **Reactions with Barium Nitrate**:
- **Sodium Chloride (\( NaCl \))**:
\[ 2 NaCl + Ba(NO_3)_2 \rightarrow 2 NaNO_3 + BaCl_2 \]
\( BaCl_2 \) is soluble in water (no precipitate).

- **Sodium Sulfate (\( Na_2SO_4 \))**:
\[ Na_2SO_4 + Ba(NO_3)_2 \rightarrow 2 NaNO_3 + BaSO_4 \downarrow \]
\( BaSO_4 \) is a precipitate.

- **Disodium Hydrogen Phosphate (\( Na_2HPO_4 \))**:
\[ Na_2HPO_4 + Ba(NO_3)_2 \rightarrow 2 NaNO_3 + Ba_3(PO_4)_2 \downarrow \]
\( Ba_3(PO_4)_2 \) is a precipitate.

- **Sodium Chromate (\( Na_2CrO_4 \))**:
\[ Na_2CrO_4 + Ba(NO_3)_2 \rightarrow 2 NaNO_3 + BaCrO_4 \downarrow \]
\( BaCrO_4 \) is a precipitate.

4. **Conclusion**:
- The only compound that gives a precipitate with \( Pb(NO_3)_2 \) but does not give a precipitate with \( Ba(NO_3)_2 \) is **Sodium Chloride (\( NaCl \))**.

### Final Answer:
**Sodium Chloride (\( NaCl \))** gives a precipitate with \( Pb(NO_3)_2 \) but not with \( Ba(NO_3)_2 \).