THE METAL WHOSE ORE CAN BE CONCENTRATED BY PASSING IT THROUGH A MAGNETIC SEPARATOR IS

• A. Zn
• B. Sn ✓
• C. Cu
• D. Ca

The metal whose ore can be concentrated by passing it through a magnetic separator is Sn (Tin).

Explanation:

1. Zinc (Zn): Zinc ores are primarily concentrated using froth flotation, gravity separation, and other methods that do not involve magnetic separation. Therefore, zinc ores are not concentrated using a magnetic separator.
2. Tin (Sn): Tin ores, such as cassiterite (SnO2), can be concentrated by passing them through a magnetic separator. This process exploits the difference in magnetic properties between the tin ore and other impurities, allowing for effective separation.
3. Copper (Cu): Copper ores are typically concentrated using froth flotation, smelting, and leaching methods but not through magnetic separation. Magnetic separation is not commonly employed in the concentration of copper ores.
4. Calcium (Ca): Calcium is not extracted from its ore using magnetic separation techniques. The concentration of calcium typically involves processes like electrolysis or chemical precipitation rather than magnetic separation.

Therefore, among the options provided, tin (Sn) is the metal whose ore can be concentrated by passing it through a magnetic separator.