Question

Choose the correct combination of labelling of the potato osmoscope experiment.

A. a- final level, b- dot pin, c- initial level, d- sugar solution, e- potato tuber
B. a- initial level, b- dot pin, c- final level, d- water, e- potato tuber
C. a- final level, b- dot pin, c- initial level, d- water, e- potato tuber
D. a- final level, b- dot pin, c- initial level, d- coconut oil, e- potato tuber
E. a- initial level, b- dot pin, c- final level, d- coconut oil, e- potato tuber

Answer 1

Potato Osmoscope is used to demonstrate osmosis in living plants and it is also called a potato osmometer. In a potato osmoscope experiment, water moves into the osmoscope due to the process of endosmosis.

Complete answer:
Potato Osmoscope is used to demonstrate osmosis in living plants and it is also called a potato osmometer. Since the potato tuber is used in it, it is therefore called a potato osmometer. In this process, a cavity is made and in this cavity hypertonic solution is taken as compared to the external solution in the environment.

So the outer solution will be the hypotonic solution. Hypotonic solution means the potential of water is high and the concentration is low there and in the hypertonic solution, the potential of water is low and the concentration is high.

So, the water moves from a high potential area to a low potential area. So, the strong sugar solution is added in this cavity. So, if we look at the diagram. D mark is there for the solution in cavity therefore D is Sugar solution as the sugar solution is added.

Using the dot pin, the initial level is marked to know the rise of water in endosmosis. So, if we look at the diagram, the dot pin is marked as b which is to check the initial level. So, b is the dot pin.

The initial level is marked as c and the final level is a since the rise is what needs to be noted. Since the experiment is done on potato tubers then ‘e’ is clearly a potato tuber.
The whole set up is placed in a beaker which contains coloured water and after a few hours, there is rise in the sugar solution within the potato tuber which becomes coloured due to the osmosis. Water molecules move from lower concentration solutions to high concentration solutions. through a semipermeable membrane.

Hence, the correct answer is option (A).

Note: Since the experiment is done on potato tuber then e is clearly a potato tuber. The initial level is marked as c and the final level is a which got rise, b is a dot pin which is so clear from the diagram. d is the sugar solution in the cavity.