Identify the alloy containing a non-metal as a constituent in it.

In the wrought iron of the iron pillar located in Delhi,what other elements are present besides iron?

Copper matte is composed of . . . . . .

Read the following statements :
$(I)$ $Al$ has greater affinity than that of $Cr$ for oxygen
$(II)$ $Al$ can be used for reduction of $Fe_2O_3$
$(III)$ Carbon is used for reduction of $PbO$
$(IV)$ $SnO_2$ can be reduced by carbon
Choose the correct set of statement$(s)$:

For the following statements,mark $T$ for true and $F$ for false statement.
Statement $1$: $SnO_2 +$ wolframite,in this $SnO_2$ is magnetic while wolframite is non-magnetic in nature.
Statement $2$: Argentite ore is concentrated by froth floatation method.
Statement $3$: Copper and lead ores are reduced by self-reduction method.
Statement $4$: In metallurgy of $Fe$,$CO$ is used as a reducing agent at low temperature.

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