Experimental Study of Osmosis by Potato Osmometer MCQ - Practice Questions with Answers
Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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5 Questions around this concept.
Solve by difficulty
MEDIUMAn unpeeled potato filled with solution and kept in the pure solvent does not show the endosmosis because
Why does the level of solution rises from the initial level in the osmoscope?
Why do solvent particles from the pure solvent move toward the solution side in the osmometer?
Why is an osmoscope used?
Select the right option considering the below statements:
Statement I: When osmosis is demonstrated with a potato Osmoscope device, the sugar solution in the cavity of the potato becomes colored, and the level increases.
Statement II: This demonstrates that water entering the sugar solution through potato tissues acts as a selectively permeable membrane.
Concepts Covered - 0
Osmoscope and Osmometer
Osmoscope:
- It was first developed by Pfeffer in 1887 using a semipermeable membrane.
- It can be prepared by using a potato.
- When the potato is peeled and the inner section of it is taken out with the help of a spoon or knife, it becomes U-shaped.
- It is then placed in a tray having a pure solvent.
- The cavity of the U-shaped potato osmoscope is filled with a 10% solution.
- A pin is marked at the initial level of the 10% solution in the potato osmoscope. This pin is labelled as an initial pin.
- After 2 hours, the level of the solution in the potato osmoscope will rise. This is endosmosis occurring due to the difference in the concentration of the solution.
- Hence, osmoscope is a device that describes the process of osmosis.
Osmometer:
- It is a U-shaped tube with a semipermeable membrane right at the centre of the base.
- On one side of the membrane the concentrated solution is filled (say 10%).
- On the other side of the membrane, the pure solvent is filled.
- As per osmosis, water molecules will start moving from the pure solvent side to the concentrated solution side.
- The water column of the concentrated solution will rise due to the endosmosis.
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