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

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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.

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