Question

An ore during the metallurgical steps gave CO2 gas.
(i) Identify the ore, give its name. Carbonate ore
(ii) State two metallurgical steps to be applied to get the free metal.
(iii) Give the equations involved.
A student has been collecting silver coins and copper coins. One day​

Answer 1

Answer:

The ore is limestone ore (CaCO3).

Explanation:

2. Calcination can be used to obtain CaO.

CaCO3 (s) ---------> CaO(s) + CO2(g)

Reduction of CaO will give free metal.

Answer 2

Answer:

The correct answer is limestone or calcium carbonate ore.  

Explanation:

The ore gives carbon dioxide during the metallurgical process. So, it must be a carbonate ore. Most possible carbonate ore is calcium carbonate or limestone.

The calcination, or heating in absence of oxygen is the process where ore is heated to high temperatures, where the carbonates are converted into oxides, and carbon dioxide leaves the system.  

$\mathrm{CaCO}_{3} \rightarrow \mathrm{CaO}+\mathrm{CO}_{2}$

Then, calcium oxide can be reduced by aluminum iron alloy in molten condition to give calcium as free metal.