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:

• A. fisher woman and concentration
• B. washer man and reduction
• C. washer woman and concentration
• D. fisher man and reduction

Answer 1

The Correct Option is C

The froth flotation method is a widely used technique for the concentration of ores in the field of extractive metallurgy. This process was inspired by the observation of a washerwoman. Let's break down the question and the given options:

1. Understanding the terms:
   • Froth Flotation Method: This process is used to separate hydrophobic materials from hydrophilic materials. It is most commonly used in the mineral processing industry for concentrating ores.
   • Concentration of Ores: This is the process of increasing the percentage of the desired metal or compound in an ore.
2. Analyzing the options:
   • Option 1: Fisher woman and concentration - This is incorrect as no historical evidence suggests a fisher woman inspired this method.
   • Option 2: Washer man and reduction - Reduction refers to the process of converting ore into pure metal, which is unrelated to froth flotation.
   • Option 3: Washer woman and concentration - Historically correct, as the observation of a washerwoman led to the development of the froth flotation method.
   • Option 4: Fisher man and reduction - Incorrect for the same reasons as option 2 and 1.
3. Conclusion:
   • The correct answer is that the froth flotation method, inspired by the working of a washerwoman, is used for the concentration of ores. Therefore, the correct choice is "Washer woman and concentration".

Thus, the correct option is "Washer woman and concentration".