SC-350
Diffusion
Lower Sec Science · Secondary 1 · Hard · Diffusion
A student places a small crystal of potassium permanganate at the bottom of a beaker of still water. After 30 minutes, the water throughout the beaker turns purple. Which statement best explains this observation in terms of particles?
- Water particles move only upwards, carrying the colour.
- The coloured particles sink to the bottom of the beaker.
- The coloured particles are in continuous random motion and spread out.
- The coloured particles are pushed by gravity to all parts of the water.
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