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Class 9 · Chemistry

Design a particle filter

Interactive explanation Gamified quiz, feedback & rewards

0 XP0 mastered
NCERT chapter connection · Learning goals & preparation

By the end, you can…

  • Explain Passes when particle size < pore opening
  • Change one input at a time and predict its effect before checking the model.
  • Apply the relationship in a quiz and explain the reasoning behind your answer.

Useful preparation: Counting particles, ratios and the difference between a model and a real substance. Suggested previous stop: Investigate a charged beam.

Exploration · Exploring Mixtures and their Separation
NCERT ePathshala current chapter index · checked 12 Nov 2026. This activity explores part of the chapter; it does not replace the textbook. Open official NCERT reference ↗

Hands-on explainer · Class 9

Design a particle filter

Class 9
Opening 3 · particle size 5Larger particles remain as residue
0%
The relationshipPasses when particle size < pore opening
01 · How to explore

Make the idea your own

  1. 1Compare a particle with an opening in the filter.
  2. 2Run the filter and follow the suspended particles.
  3. 3Change the opening to switch between passage and retention.
02 · Take it further

Explain the experiment

When the goal is met: The particles are larger than the openings and stay above the filter. Dissolved substances would need a different separation method.