The froth flotation process used for the conc | vedclass

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(D) . The froth flotation process is based on the difference in the wettability of different minerals. The metallic sulphide particles are preferentia

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All of the above statements are correct.

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(D) . The froth flotation process is based on the difference in the wettability of different minerals. The metallic sulphide particles are preferentially wetted by oil,while the gangue particles are wetted by water.$B$. Sodium ethyl xanthate,$C_2H_5OCS_2Na$,acts as a collector. Collectors attach themselves to the mineral grains via polar groups,making the minerals water-repellent so they pass into the froth.$C$. $NaCN$ acts as a depressant in the separation of $ZnS$ and $PbS$. It forms a soluble complex with $ZnS$ $(Na_2[Zn(CN)_4])$,preventing it from floating,while $PbS$ forms froth.Since all statements are correct,the answer is $D$.

$I$	$II$
$X$. Magnetic separation	$a$. $Ag_2S$
$Y$. Froth floatation	$b$. $FeCr_2O_4$
$Z$. Gravity separation	$c$. $Al_2(SiO_3)_3$

The froth flotation process used for the concentration of sulphide ore:

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$I$ $II$

$X$. Magnetic separation $a$. $Ag_2S$

$Y$. Froth floatation $b$. $FeCr_2O_4$

$Z$. Gravity separation $c$. $Al_2(SiO_3)_3$

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Depressant used in the concentration of an ore containing $ZnS$ and $PbS$ is

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