Which of the following processes of metallurgy involves adsorption ?

Options

A. Magnetic separation method
B. Electrostatic separation method
C. Gravity separation method
D. Froth floatation process

Answer

To determine which process of metallurgy involves adsorption, we need to analyze the given options:

1. **Froth Flotation Process**: This process is specifically designed to separate hydrophobic materials from hydrophilic ones. In this method, the ore is mixed with water and pine oil, which creates a froth. The ore particles become adsorbed onto the bubbles in the froth, allowing them to rise to the surface and be collected. Therefore, this process involves adsorption.

2. **Magnetic Separation Method**: This method utilizes magnets to separate magnetic materials from non-magnetic ones. It does not involve adsorption but rather relies on the magnetic properties of the materials. Hence, this option does not involve adsorption.

3. **Electrostatic Separation Method**: This method uses electrostatic charges to separate particles based on their electrical conductivity. Similar to magnetic separation, it does not involve adsorption but rather the physical separation of charged particles. Thus, this option is also incorrect.

4. **Gravity Separation Method**: This method separates components based on their density differences using gravitational force. It is a physical separation technique and does not involve adsorption. Therefore, this option is not correct either.

After analyzing all the options, we conclude that the process of metallurgy that involves adsorption is:

**Correct Answer: Froth Flotation Process**