Correctly match the List-$I$ with List-$II$:

List-$I$	List-$II$
$(P) \ [M(CN)_2]^-$	$(1) \ Ni$ (during refining of metal)
$(Q) \ [M(CO)_4]$	$(2) \ Ti$ (during refining of metal)
$(R) \ MI_4$	$(3) \ Pb$ (during roasting of ore)
$(S) \ MO$	$(4) \ Ag$ (during leaching of ore)

Identify the metal which is not common to German silver and brass.

Match the following processes in List-$I$ with their respective applications in List-$II$:

List-$I$	List-$II$
$A$. Van Arkel method	$P$. Purification of titanium
$B$. Solvay process	$Q$. Manufacture of $Na_2CO_3$
$C$. Bassemerisation	$S$. Reduction of copper
$D$. Hall-Herault process	$R$. Reduction of aluminium

Which of the following statements is correct?

Give the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false.
$(i)$ $Cu$ metal is extracted from its sulphide ore by reduction of $Cu_2O$ with $FeS$.
$(ii)$ An ore of Tin containing $FeCrO_4$ is concentrated by magnetic separation method.
$(iii)$ Auto reduction process is used in the extraction of $Cu$ & $Hg$.
$(iv)$ Cassiterite and Rutile are oxide ores of the metals.

Concentrated sodium hydroxide can separate a mixture of