A student took four peeled potato halves and scooped each one out to make potato cups. He put the potato cups in a trough containing water.
Now, he did the following
(a) Kept 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.
He kept this set up for two hours. Based on the information given above answer the questions
that follow:
a) What will you observe in the hollowed portion of B and C? Why?
b) Why is potato A necessary for this experiment?
c) What will be your observation in hollowed out portions of A and D? Explain
Answers
Answer:
a) In b and C the water rise because one contain sugar and other salt so that the rise due to osmosis.
b) no, because it is empty so no osmosis occur so in A first it is empty then it will fill by a solution.
C)in a no osmosis is occur and in d also no osmosis is take place because in d by boiling the cells of potato kill and hence osmosis is not done in this case.
HOPE IT HELP !
(i) Since sugar and salt was present in B and C respectively, water from the trough gathered in the hollowed portions of potato in B and C by the process of osmosis.
(ii) 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.
(iii) 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.