Impure tin contains `SnO_(2)` as one of the impurities. Name the specific method employed for converting `SnO_(2)` present in impure metal to tin.

Explanation

To convert the impurity SnO₂ (tin(IV) oxide) present in impure tin to pure tin, the specific method employed is known as the **poling method**. Here’s a step-by-step explanation of the process:

### Step-by-Step Solution:

1. **Identify the Impurity**: The impurity in the impure tin is SnO₂, which is an oxide of tin.

2. **Understand the Poling Method**: The poling method is specifically used for reducing metal oxides, such as SnO₂, to their respective metals. This method is commonly applied to metals like copper and tin.

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