Question

How is ore-dressing of iron done?

(a) Froth Flotation

(b) Magnetic separation

(c) Hand picking

(d) By wetting

I have been asked this question during an internship interview.

I need to ask this question from Extraction of Crude Metal from Concentrated Ore topic in division General Principles and Processes of Isolation of Elements of Chemistry – Class 12

Answer 1

Correct answer is (b) Magnetic separation

For explanation I would say: In magnetic separators, the effect of magnetism is used to separate ferromagnetic materials from non-magnetic materials. In principle, this process is also suitable for the iron ores siderite and hematite, which become weakly magnetic when heated.