BI-1693
Diffusion
Biology · Secondary 4 · Medium · Diffusion
A student investigates diffusion by placing a crystal of potassium permanganate in a beaker of still water. After 30 minutes, the purple colour has spread throughout the water. Which statement best explains this observation?
- Water particles move from low to high concentration, carrying colour with them.
- Permanganate particles move randomly from high to low concentration.
- Permanganate particles are pulled upwards by gravity into the water.
- Water particles push the permanganate particles only when stirred.
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