Sodium cyanide solution is used to extract _____or _____from its ores.

Answer

**Step-by-Step Solution:**

1. **Identify the Chemical Used**: The question mentions sodium cyanide solution, which is represented chemically as NaCN.

2. **Understand the Purpose**: Sodium cyanide is commonly used in the extraction of certain metals from their ores. This process is known as cyanidation.

3. **Determine the Metals Extracted**: The metals that are typically extracted using sodium cyanide solution are those that are less reactive.

4. **Refer to the Reactivity Series**: In the reactivity series of metals, gold (Au) and silver (Ag) are found at the bottom, indicating that they are among the least reactive metals.

5. **Conclude the Answer**: Therefore, sodium cyanide solution is used to extract gold (Au) and silver (Ag) from their ores.

**Final Answer**: Sodium cyanide solution is used to extract **gold (Au)** or **silver (Ag)** from its ores.

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