Question

Class 9
biology
Q- Carry out the following osmosis experiment: (Page no. 67 Question no. 9)

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:

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

(ii) Why is potato A necessary for this experiment?

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

Answer 1

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