Question

The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are:

Options

• washer woman and concentration

• fisher woman and concentration

• washer man and reduction

• fisher man and reduction

Answer 1

Washer woman and concentration

Explanation:

The froth flotation method for the concentration of sulphide ores was inspired by the observation of a washer woman, who noticed that dirt and heavier particles sink while lighter greasy particles float on water. Similarly, in this process, sulphide ore particles stick to the froth and float, while the gangue particles sink.