Question

An ore of tin $Sn{O}_2$ containing $FeCr{O}_4$ is concentrated by:

• A. magnetic separation
• B. froth floatation
• C. gravity separation
• D. None of the above

Answer 1

The correct option is A magnetic separation

Magnetic seperation is based on differences​ in magnetic properties present​ in ore particles.​ This method is used to separate magnetic impurities from​ non-magnetic ores​.
$FeCr{O}_4$ present in the ore is magnetic and attracted by magnet while tin is not attracted by magnet.
On moving over a magnet, $FeCr{O}_4$ is separated from the tin ore. Hence option (a) is the correct option.