Consider the following statements. Which of t | vedclass

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(D) $(i)$ Froth floatation is specifically used for sulphide ores because sulphide ores are preferentially wetted by oil,while gangue is wetted by wat

Vedclass · Accepted Answer

All are correct

Vedclass · Answer

(D) $(i)$ Froth floatation is specifically used for sulphide ores because sulphide ores are preferentially wetted by oil,while gangue is wetted by water. This is correct.$(ii)$ The principle of froth floatation is indeed the differential wettability of the ore (wetted by oil) and the gangue (wetted by water). This is correct.$(iii)$ Red Bauxite ($Fe_2O_3$ impurity) is concentrated using the Bayer's process,which involves leaching with $NaOH$. This is correct.$(iv)$ In the extraction of zinc from zinc blende $(ZnS)$,the ore is first roasted to $ZnO$. Then,$ZnO$ is reduced using carbon (coke) in a furnace. This is correct.Therefore,all statements are correct.

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