Which of the following changes involve more than two metallurgical processes?

Which of the following elements constitutes a major impurity in pig iron?

Identify the correct statements from the following:
$(i)$ In the extraction of $Ag$ and $Au$,zinc is used as a reducing agent.
$(ii)$ Impure zinc can be refined by distillation method.
$(iii)$ Malachite is an ore of nickel.

Given below are two statements related to Ellingham diagram:
Statement-$I$ : Ellingham diagrams can be constructed for formation of oxides,sulfides and halides of metals.
Statement-$II$ : It consists of plots of $\Delta_f H^0$ vs $T$ for formation of oxides of elements.
In the light of the above statements,choose the most appropriate answer from the options given below:

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.

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

List-$I$	List-$II$
$(a)$ van Arkel method	$1$. Manufacture of caustic soda
$(b)$ Solvay process	$2$. Purification of titanium
$(c)$ Cupellation	$3$. Manufacture of $Na_2CO_3$
$(d)$ Poling	$4$. Purification of copper
$ $	$5$. Refining of silver

Codes :