alleryStart learning →Froth flotation is the method of choice for concentrating
Aoxide ores
Bcarbonate ores
Cnative gold ores
Dsulphide ores
Answer & Solution
Correct answer: D. sulphide ores
1. Froth flotation exploits that sulphide ore particles are preferentially **wetted by oil** while gangue is wetted by water.
2. It is therefore used mainly for **sulphide ores** such as galena (PbS) and zinc blende (ZnS).
3. Oxide/haematite and native ores are usually concentrated by gravity (hydraulic) washing instead.
_Source: Samacheer Kalvi Class 12 Chemistry Vol.1, Unit 1 'Metallurgy', §1.2.2_
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