Question

What is the name of the process where carbonate ores are converted to oxides by heating in limited air?

• A. Calcination
• B. Electrolysis
• C. Roasting
• D. Smelting

Hint:

- Calcination: Carbonate ores, limited air. - Roasting: Sulfide ores, excess air.

Answer 1

The Correct Option is A

Step 1: Recall methods for converting ores to oxides.
Metal extraction often involves converting ores to oxides.
Step 2: Define the given processes.
Calcination:
Heating carbonate ores in limited air to form oxides and release \(CO_2\).
Electrolysis:
Using electricity to drive non-spontaneous reactions.
Roasting:
Heating sulfide ores in excess air to form oxides and \(SO_2\).
Smelting:
Reducing metal oxides at high temperatures.
Step 3: Identify the process for carbonate ores in limited air.
Calcination fits the description provided in the question.