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

In the metallurgy of iron,when limestone is added to the blast furnace,the calcium ions end up in:

What is the appropriate process for the extraction of lead from low-grade ore (impurity level is high)?

What are the metals and their approximate percentages in German silver?

Which of the following methods are not used to refine any metal?
$A$. Liquation $B$. Calcination $C$. Electrolysis $D$. Leaching $E$. Distillation
Choose the correct answer from the options given below.

Consider the following statements:
$(a)$ When the lead-silver alloy is rich in silver,lead is removed by the cupellation process.
$(b)$ Froth flotation can be applied for non-sulphide ores also using a suitable activator.
$(c)$ $PbSO_4 + H_2SO_4$ electrolyte is used for the refining of $Pb$ by electrolysis.
$(d)$ Any metal will not reduce the oxide of other metals which lie above it in the Ellingham diagram.
Using $'T'$ for true and $'F'$ for false statements in the given sequence,select the correct set of code.