Given below are two statements:
Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.
Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a froth flotation method.
Choose the most appropriate answer from the options given below :

Given below are two statements.
Statement I: The choice of reducing agents for metals extraction can be made by using the Ellingham diagram, a plot of $\Delta \mathrm{G}$ vs temperature.
Statement II: The value of $\mathrm{\Delta S}$ increases from left to right in the Ellingham diagram.

In the light of the above statements, choose the most appropriate answer from the options given below:

Match List I with List II : (Both having metallurgical terms)

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below:

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${\mathrm{Al}}_2{\mathrm{O}}_3$ was leached with alkali to get $\mathrm{X}.$ The solution of $\mathrm{X}$ on passing of gas $\mathrm{Y},$ forms $\mathrm{Z}.$

$\mathrm{X},\mathrm{Y}$ and $\mathrm{Z}$ respectively are