Which of the following is not correctly matched?

Options

A. `Chalcopyrites to CuFeS_2`
B. `Smithsonite to ZnCO_3`
C. Magnetite `to` `Fe_3O_4`
D. Argentite `to` `Na_3AlF_6`

Answer

To solve the question of which of the following is not correctly matched, we will analyze each option provided:

1. **Chalcopyrite**:
- Chalcopyrite is known to be an ore of copper.
- Its chemical formula is \( \text{CuFeS}_2 \).
- Since the question states it is matched with \( \text{Cu} \), this is correctly matched.

2. **Smithsonite**:
- Smithsonite is recognized as an ore of zinc.
- Its chemical formula is \( \text{ZnCO}_3 \).
- The option states it is matched with \( \text{ZnCO}_3 \), which is correct.

3. **Magnetite**:
- Magnetite is an ore of iron.
- Its chemical formula is \( \text{Fe}_3\text{O}_4 \).
- The option states it is matched with \( \text{Fe}_3\text{O}_4 \), which is also correct.

4. **Argentite**:
- Argentite is an ore of silver.
- Its chemical formula is \( \text{Ag}_2\text{S} \).
- The option states it is matched with \( \text{Na}_3\text{AlF}_6 \), which is incorrect.

After analyzing all the options, we find that the only incorrect match is for Argentite. Therefore, the answer to the question is:

**Option D** is not correctly matched.