which of the following is best concentrated by froth floatation method?
a)galena b)magnetite c)malachite d)cassiterite

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Solution

Galena (ZnS) is a sulphide ore. Galena is best concentrated by froth floatation method. Froth floatation method is used to concentrate sulphide ores. Magnetite (Fe₃O₄) is an ore of iron . Malachite (Cu₂CO₃(OH)₂) is an ore of copper and cassiterite (SnO₂) is an ore of tin. Hence, only galena contains sulphide ion.

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Which one of the following ores is best concentrated by froth floatation method ?

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