Question

Which of the following pairs of ores can be concentrated using the technique of magnetic separation?​

• A. Haematite, siderite​
• B. Haematite, galena
• C. Mauxite, malachite ​
• D. Malachite, galena​

Answer 1

The correct option is A Haematite, siderite​

Magnetic separation is based on the different magnetic properties of the ore and the gangue particles.
Since haematite (${Fe}_2{O}_3$) and siderite (${FeCO}_3$) are ores of iron so they can be separated out using the magnetic separation method.
So option d is the correct answer.