What is Thomas slag?

Bessemerisation is carried out for:
$I$: $Fe$
$II$: $Cu$
$III$: $Al$
$IV$: Silver

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)

The statement that is $INCORRECT$ about Ellingham diagram is :

The correct option$(s)$ related to the extraction of iron from its ore in the blast furnace operating in the temperature range $900-1500 \ K$ is(are):
$(A)$ Limestone is used to remove silicate impurity.
$(B)$ Pig iron obtained from blast furnace contains about $4 \%$ carbon.
$(C)$ Coke $(C)$ converts $CO_2$ to $CO$.
$(D)$ Exhaust gases consist of $NO_2$ and $CO$.

Match the items under List-$I$ with the compounds/elements from the List-$II$. Select the correct answer from the sets $(a), (b), (c)$ and $(d)$.

List-$I$	List-$II$
$(i)$ Explosive	$(A)$ $NaN_3$
$(ii)$ Artificial gem	$(B)$ $Fe_3O_4$
$(iii)$ Self reduction	$(C)$ $Sn$
$(iv)$ Magnetic material	$(D)$ $Al_2O_3$
	$(E)$ $Pb(N_3)_2$
	$(F)$ $Fe_2O_3$
	$(G)$ $Cu$
	$(H)$ $SiC$