Question

Identify x, y, z for the following metallurgical process.
\[{\text{Metal}}\,{\text{sulphide}}\,\xrightarrow{x}\,{\text{Metal}}\,{\text{oxide}}\xrightarrow{y}\,{\text{Impure}}\,{\text{metal}}\xrightarrow{z}\,{\text{Pure}}\,{\text{metal}}\]
X, y and z are respectively:
A.roasting, smelting, electrolysis
B.roasting, calcination, smelting
C.calcination, auto-reduction, bassemeristion
D.None of the above correct

Answer 1

Hint: Metallurgy is defined as a process that is used for the extraction of metals in their pure form. Some common metallurgy processes include roasting, smelting, electrolysis, calcination etc.

Complete step by step answer:
We know that Roasting is a process in metallurgy in which the sulphide ore is heated in air and then is transformed into oxides. Smelting is a process where a base metal is extracted from its corresponding metal oxides. Electrolysis is a process used in extraction or purification of metals from its ores or compounds.
Given reaction is,
\[{\text{Metal}}\,{\text{sulphide}}\,\xrightarrow{x}\,{\text{Metal}}\,{\text{oxide}}\xrightarrow{y}\,{\text{Impure}}\,{\text{metal}}\xrightarrow{z}\,{\text{Pure}}\,{\text{metal}}\]
In the reaction we see that a metal sulphide will be transformed into a metal oxide by heating which is a roasting process. The metal oxide is converted to impure metal which is a smelting process. Then the impure metal is converted to pure metal. This is possible by the method of electrolysis.
So, we can say that the x is roasting, y is smelting and z is electrolysis.

So, the correct answer is Option A .

Note:
The process of metallurgy has various steps. These are,
1)Crushing and grinding of the ores
2)Ore dressing
3) Hydrolytic method
4) Magnetic separation
5)Froth floatation
6) Roasting and calcination
In metallurgy the metals are extracted commercially from the minerals at minimum cost and with minimum effort. These minerals are called ores.