Here are 25 simple, creative, and easy Chemistry Working Model ideas for Class 9 — perfect for school exhibitions, project work, and practical demonstrations.
1. States of Matter Model
Show solid–liquid–gas arrangement using balls, beads, and springs.
2. Water Purification Model
DIY 3-layer filter: gravel, charcoal, sand + cotton.
3. Separation of Mixtures
Filtration, sedimentation, decantation, evaporation (mini lab model).
4. Distillation Model
Simple distillation setup using plastic bottles + tubing.
5. pH Scale & Indicators
Natural color indicators (turmeric, beetroot, cabbage) + pH chart.
6. Electrolysis of Water
Splitting water into hydrogen & oxygen using battery + electrodes.
7. Density Demonstration
Saltwater vs freshwater density model.
8. Air Pollution Model
SO₂/NO₂ indicators; city pollution model with chimneys.
9. Carbon Cycle Chemical Model
Carbon dioxide production, absorption, and its chemical effects.
10. Endothermic & Exothermic Reactions
Baking soda + vinegar (endo), CaCl₂ + water (exo).
11. Types of Chemical Reactions
Combination, decomposition, single displacement, double displacement.
12. Crystallization Model
Copper sulfate or sugar crystal formation.
13. Water Hardness Test
Soap lather model showing difference between hard & soft water.
14. Acids, Bases, and Salts
Colour change indicators + neutralisation model.
15. Hydrogen Gas Production
Mg + HCl → hydrogen gas collection demo (safe small scale).
16. Fire Extinguisher Chemical Model
Baking soda + acid producing CO₂ to extinguish flame.
17. Tyndall Effect (Colloids)
Torch beam passing through milk colloid.
18. Sublimation Model
Camphor/naphthalene sublimation setup (with transparent cover).
19. Electroplating Model
Copper plating on key/spoon using CuSO₄ solution.
20. Rusting of Iron
Factors affecting rusting—air, moisture, saltwater.
21. Greenhouse Effect Model
CO₂ chamber vs normal air chamber temperature difference.
22. Lava Lamp Chemistry Model
Oil + water + effervescent tablets showing density + gas formation.
23. Simple Battery Model
Lemon/potato/saltwater battery to light an LED.
24. Soap Making (Saponification)
Simple demonstration of fat + base → soap.
25. Water Cycle Chemistry Model
Evaporation, condensation, precipitation with chemical explanation.