NCERT Exercise Q9 - The Fundamental Unit of Life
Question: Carry out the following osmosis experiment with potato cups A (empty), B (sugar), C (salt), D (boiled potato + sugar). Explain: (i) why water gathers in B and C, (ii) why potato A is necessary, (iii) why water does not gather in A and D.
Answer: **(i) Water gathers in B and C because:** Sugar/salt dissolved in the hollow creates a **hypertonic solution** (high solute concentration) inside. Water from the trough (lower solute concentration)...
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