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Abundance of Elements

How many of t...

Question

How many of the following metallic ores are concentrated by magnetic seperation method?
cassiterite, pyrolusite, rutile, magnetite, galena, cinnabar, chloroapatite, wolframite, chromite, zinc blende

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Solution

Pyrolusite is concentrated by leaching.
Galena and zinc blende are concentrated by froth-flotation.

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Q. How many metallic ores are concentrated by the magnetic separation method from the given ores?
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