Question

Carry out the following osmosis experiment:
Take four peeled potato halves and scoos each one out to make four cups should be made from a boiled potato . put each potato cup in a through containing water . Now
(a) keep cup A empty
(b) put one teaspoon sugar in cup B
(c) put one teaspoon salt in cup C
(d) put one teaspoon sugar in the boiled potato cup D
Keep these for two hours . Then observe the four potato cups and answer the following:
1. Explain why water gathers in the hollowed portion of B and C .
2. why is potato A necessary for this experiment?
3. Explain why water does not gather in the hollowed out portion of A and D.
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Answer 1

$\huge\sf\fbox\blue{ Äñ§wêᴿ᭄ 1 }$

Water gathers in the hollowed portion of B and C due to process of Osmosis in which outside water with high concentration make a passage through a semi-permeable membrane of potato to mix with salt or sugar with low water concentration inside the potato .

$\huge\sf\fbox\pink{ Äñ§wêᴿ᭄ 2 }$

Potato A is necessary for carrying out this experiment because it acts as a control experiment. Control helps us to check what changes occurred during the course of the experiment and helps us to compare the results.

$\huge\sf\fbox\orange{ Äñ§wêᴿ᭄ 3 }$

Water does not gather in the hollowed portion of potato A as it was empty. Water also does not gather in the cup D because the potato used was boiled which makes it inactive as after boiling its protein structure were denatured, resulting in the disruption of the cell membrane.