Consider the following statements:(i) Froth f | vedclass

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(D) Statement $(i)$ is correct: Froth flotation is primarily used for the concentration of sulphide ores.Statement $(ii)$ is correct: The principle of

Vedclass · Accepted Answer

All are correct

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(D) Statement $(i)$ is correct: Froth flotation is primarily used for the concentration of sulphide ores.Statement $(ii)$ is correct: The principle of froth flotation is the difference in the wetting characteristics of the ore (wetted by oil) and the gangue (wetted by water).Statement $(iii)$ is correct: Red bauxite (containing $Fe_2O_3$ as impurity) is concentrated using Bayer's process,which involves leaching with $NaOH$.Statement $(iv)$ is incorrect: Zinc blende $(ZnS)$ is first roasted to $ZnO$,and then $ZnO$ is reduced using coke (carbon). However,the statement implies direct reduction of zinc blende,which is not the standard industrial process; usually,roasting is a prerequisite. Given the context of standard chemistry questions,$(i), (ii),$ and $(iii)$ are the most accurate descriptions. However,since $ZnO$ is reduced by carbon,if the question implies the overall process,$(iv)$ is often considered correct in many textbooks. Thus,all statements are correct.

List-$I$	List-$II$
$I$. Cyanide process	$A$. Ultrapure $Ge$
$II$. Floatation process	$B$. Pine oil
$III$. Electrolytic reduction	$C$. Extraction of $Al$
$IV$. Zone refining	$D$. Extraction of $Au$

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Match List-$I$ with List-$II$ and select the correct answer using the codes given below the lists.

List-$I$ List-$II$

$I$. Cyanide process $A$. Ultrapure $Ge$

$II$. Floatation process $B$. Pine oil

$III$. Electrolytic reduction $C$. Extraction of $Al$

$IV$. Zone refining $D$. Extraction of $Au$

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