Matter in Our Surroundings — Science STD 9 — Question
Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings3 Marks
Question
Show experimentally that matter is made up of small particles.
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Answer
Take $2-3$ crystals of potassium permanganate and dissolve them in $100\ ml$ of water.
Take out approximately 10ml of this solution and put it into $90\ ml$ of clear water.
Take out $10\ ml$ of this solution and put it into another $90\ ml$ of clear water.
Keep diluting the solution like $5$ to $8$ times.
Is the water still coloured?
This experiment shows that just a few crystals of potassium can colour a large volume of water. So we conclude that there must be millions of tiny particles.
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