Match List-$I$ (substances) with List-$II$ (processes) employed in the manufacture of the substances and select the correct option.

List-$I$ (Substances)	List-$II$ (Processes)
$A$. Sulphuric acid	$i$. Haber's process
$B$. Steel	$ii$. Bessemer's process
$C$. Sodium hydroxide	$iii$. Leblanc process
$D$. Ammonia	$iv$. Contact process

Identify the products of the reaction: $4FeCr_2O_4 + 8Na_2CO_3 + 7O_2 \rightarrow ?$

In the electrolysis of $Al_2O_3$ by the Hall-Heroult process,which of the following statements is correct?

The statement that is $NOT$ correct is:

To obtain steel entirely free from sulphur and phosphorus,the process used is

Consider the following metallurgical processes:
$I$. Heating impure metal with $CO$ and distilling the resulting volatile carbonyl (b.p. $43 \ ^oC$) and finally decomposition at $150 \ ^oC - 200 \ ^oC$ to get the pure metal.
$II$. Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged metal sulphide.
$III$. Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and $NaCl$ to obtain the metal.
The processes used for obtaining magnesium,nickel and copper are respectively: