Tin stone (cassiterite) is purified by magnetic separation method. Name and formulate the magnetic chemical present with it.

Explanation

To solve the question regarding the purification of tin stone (cassiterite) by the magnetic separation method, we will follow these steps:

### Step 1: Understand the Composition of Tin Stone
Tin stone, also known as cassiterite, primarily consists of tin dioxide (SnO2). However, during the mining and extraction processes, it may contain various impurities.

### Step 2: Identify the Magnetic Impurity
In the case of cassiterite, one of the common magnetic impurities that can be present is wolframite. Wolframite is a mineral that contains iron and tungsten.

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