When $ZnS$ and $PbS$ minerals are present together,then $NaCN$ is added to separate them in the froth floatation process as a depressant,because
- A$Pb(CN)_2$ is precipitated while no effect on $ZnS$
- B$ZnS$ forms soluble complex $Na_2[Zn(CN)_4]$
- C$PbS$ forms soluble complex $Na_2[Pb(CN)_4]$
- DThey cannot be separated by adding $NaCN$
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Similar Questions
The process which involves the treatment of the ore with a suitable reagent so as to make it soluble but not the impurities is called:
Which of the following ores is concentrated by the leaching process?
Easy
View SolutionSulphide ores are generally concentrated by
Easy
View SolutionMatch the method of concentration of the ore in column $I$ with the ore in column $II$ and select the correct alternate :
$I$ $II$ $X$. Magnetic separation $a$. $Ag_2S$ $Y$. Froth floatation $b$. $FeCr_2O_4$ $Z$. Gravity separation $c$. $Al_2(SiO_3)_3$
| $I$ | $II$ |
| $X$. Magnetic separation | $a$. $Ag_2S$ |
| $Y$. Froth floatation | $b$. $FeCr_2O_4$ |
| $Z$. Gravity separation | $c$. $Al_2(SiO_3)_3$ |
Medium
View SolutionWhich of the following magnetic impurity is present in Cassiterite ore?
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