Which of the following ores cannot be concent | vedclass

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(C) The froth flotation method is primarily used for the concentration of sulphide ores. $CuFeS_2$ (Copper pyrites),$Ag_2S$ (Silver glance),and $ZnS$

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Pyrolusite $(MnO_2)$

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(C) The froth flotation method is primarily used for the concentration of sulphide ores. $CuFeS_2$ (Copper pyrites),$Ag_2S$ (Silver glance),and $ZnS$ (Zinc blende) are sulphide ores and can be concentrated by this method. $MnO_2$ (Pyrolusite) is an oxide ore,which is typically concentrated by gravity separation or magnetic separation,not by froth flotation.

Which of the following ores cannot be concentrated by the froth flotation method?

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