Carry out the following osmosis experiment:

Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,

1. Keep cup A empty
2. Put one teaspoon sugar in cup B
3. Put one teaspoon salt in cup C
4. 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:

Answer

1. Due to the presence of water level differences. Endo-osmosis occurs.
2. We need potato A to compare the changes occurring in the other potatoes. As it shows that only a potato cavity cannot bring any movement of water without any change in concentration.
3. Water does not gather in the hollowed portion of potato A as it was empty. Water also 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.