Which diagram represents the most effective design for a microscopic membrane filter to purify contaminated water? (A) (B) (C) (D) - HSC - SSCE Chemistry - Question 14 - 2001 - Paper 1

To identify the most effective design for a microscopic membrane filter, we need to consider how each diagram allows contaminated water to be filtered effectively.

Analysis of Diagrams

• Diagram A: Shows a round filter that does not indicate effective trapping of contaminants.
• Diagram B: Illustrates a membrane filter with contaminated water entering from one side, flowing through the membrane, and clean water emerging from the other side. This design clearly reflects how contaminants are trapped while allowing purified water to exit, making it efficient for purification.
• Diagram C: Similar to Diagram A, it lacks a proper mechanism for the trapping of contaminants.
• Diagram D: Although it shows the movement of water, it does not demonstrate an effective system for purifying water comparable to Diagram B.

Conclusion

Based on the analysis, the most effective design for a microscopic membrane filter is represented in Diagram B due to its clear functionality in trapping contaminants while allowing clean water to flow through.