Question

Name the following process $Sn{O_2} + C\xrightarrow{{1500K}}Sn + 2CO$
A.Roasting
B.Calcining
C.Sintering
D.Smelting

Answer 1

Hint:In the process, the metal oxide is converted to the base element temperature involved more than the melting point.
In the above reaction, oxygen is removed from the ore and the ore doesn’t have sulfide. With this, the solution for the reaction is found.

Complete step by step answer:
Roasting:
Roasting is the process of converting ore into oxide at high temperatures in presence of air.
Roasting consists of thermal gas-solid reactions. In this process oxidation, reduction, chlorination, sulfation, and pyrohydrolysis. In this process, the ore is treated with very hot air.
The roasting process is generally applied to sulfide minerals. In this sulfide is converted into oxide and sulfur is released as sulfur dioxide gas.
This process does not apply to the above reaction because there are no sulfide minerals present, this process is only applicable for ore with sulfide.
Thus the reaction doesn’t undergo this process.

Calcining:
Calcining is a process of heating a substance under controlled temperature.
In the calcination process heating a solid to high temperatures in air or oxygen, generally to remove impurities or volatile substances.
Calcination of a metal results in oxidation of the metal.
Thus this process does also not take place in the above reaction. Because there is no oxidation takes place.

Sintering:
Sintering is the process of forming material by heat or pressure without melting it to the point of liquefaction.
In this process, no chemical reaction takes place, and there no reduction or oxidation takes place.
Thus the process does not take place above reaction.


Smelting:
The process of obtaining a metal as an element or a simple compound from its ore by heating beyond the melting point in the presence of oxidizing agents such as air and coke is known as smelting.
In this process applying heat to ore to extract a base metal. It is a form of extractive metallurgy. It is used to extract base metal from their ores.
Thus this process takes place in the above reaction. Because in the above process base metal is obtained.
Thus, the correct answer is option (A) smelting.



Note:
In smelting, the reduction of metal oxide is reduced with a reducing agent and efficiently reduces metal oxide at a cheaper cost.
A reducing agent in the smelting process forms a gas after getting oxidized.