Railway wagon axles are made by heating iron rods embedded in charcoal powder. This process is known as:

Match the alloys in Column $A$ with their uses in Column $B$:

Column $A$	Column $B$
$(1)$ Stainless steel	$(a)$ Riveting
$(2)$ Bronze	$(b)$ Making artifacts
$(3)$ Nitinol	$(c)$ Making coins
$(4)$ German silver	$(d)$ Making musical instruments
	$(e)$ Making surgical instruments

Which of the following is an incorrect match?

Consider the following:
Statement-$I$ : In the extraction of $Al$ by Hall-Heroult process,pure $Al_2O_3$ mixed with $Na_3AlF_6$ lowers its melting point and increases conductivity.
Statement-$II$ : Zirconium metal is purified by zone refining method.

Which of the following species is (are) desirable substance$(s)$ in the extraction of copper but not in the extraction of iron?

Identify the reaction that does $NOT$ occur in a blast furnace.