Take four peeled potato halves and scoop each one cut 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,
(a) Keep cup A empty
(b) Put one teaspoon of sugar in cup B.
(c) Put one teaspoon of salt in cup C.
(d) Put one teaspoon of sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and answer the following.

Explain why water does not gather in the hollowed-out portions of cups A and D.

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Solution

Water does not gather in the hollowed portion of potato A because it was empty.
In the cup D, as the potato is boiled it makes it inactive and its protein structures are damaged.

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Similar questions

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.

(a) Keep cup A as 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.

Explain why water gathers in the hollowed portion of B and C.

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.

Explain why water does not gather in the hollowed out portions of A and D.

Question 9 (iii)
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,
(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:

(iii) Explain why water does not gather in the hollowed out portions of A and D.

Take four peeled potato halves and scoop each one cut 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,
(a) Keep cup A empty.
(b) Put one teaspoon of sugar in cup B.
(c) Put one teaspoon of salt in cup C.
(d) Put one teaspoon of sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and answer the following.

Explain why water gathers in the hollowed portion of cup B and cup C.

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.

Why is potato A necessary for this experiment?

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Water does not gather in the hollowed portion of potato A because it was empty. In the cup D, as the potato is boiled it makes it inactive and its protein structures are damaged.

Water does not gather in the hollowed portion of potato A because it was empty.
In the cup D, as the potato is boiled it makes it inactive and its protein structures are damaged.