Chemistry 2005 JAMB Past Questions - Question 46: The ores that can be concentrated by flotation are

Correct Answer

C

Explanation

Flotation is a widely used method for concentrating various types of ores. The ores that can be concentrated by flotation include:

1. **Sulphide Ores:** Many metallic ores are sulfide in nature, such as copper, lead, zinc, and nickel sulfide ores. Flotation is commonly used to separate these minerals from the gangue.

2. **Oxide Ores:** Certain oxide ores can also be concentrated by flotation. For example, hematite and magnetite, which are iron oxide ores, can be beneficiated using flotation.

3. **Nitride Ores:** Nitride ores are not typically concentrated by flotation. Nitrides are compounds of nitrogen with other elements, and their processing methods usually differ from those used for sulfide or oxide ores.

4. **Chloride Ores:** Chloride ores are also not typically concentrated by flotation. Chloride minerals are less common, and their processing methods may involve different techniques.

In summary, the ores concentrated by flotation are primarily sulfide and oxide ores, while nitride and chloride ores usually require different beneficiation methods.