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Q.

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

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a

Siderite

b

Galena

c

Malachite

d

Magnetite

answer is D.

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Detailed Solution

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  • Galena ore is best concentrated by the froth flotation method.
  • The froth flotation process is used to eliminate gangue from sulphide ores. 
  • The metal is powdered first, and then its suspension is made in the water. 
  • In this, collectors and froth stabilizers are added. In the given compounds, galena is sulphide lead which has the formula PbS.
     
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