Make the idea your own
- 1Compare a particle with an opening in the filter.
- 2Run the filter and follow the suspended particles.
- 3Change the opening to switch between passage and retention.
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Class 9 · Chemistry
Design a particle filter
Interactive explanation Gamified quiz, feedback & rewards
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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
CLASS 9 · CONCEPT QUEST
Turn understanding into a small adventureDesign a particle filter
Discover the rule, predict what happens, then solve a hands-on mission.
DiscoverFind the idea→PredictThink it through→BuildMake it click
3 rounds · no timer · up to 100 XP for your best result
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The relationshipPasses when particle size < pore opening
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.