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प्रश्न
Distinguish between the following:
Hypotonic and Hypertonic solutions
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उत्तर
| Hypotonic solutions | Hypertonic solutions | |
| (i) | In this condition, the solution outside the cell has a lower solute concentration than the cell sap. | In this condition, the solution outside the cell has a higher solute concentration than the cells sap. |
| (ii) | The water molecules from outside will move into the cell (endosmosis). | The water molecules from the interior of the cell will move out (exosmosis) under excessive root pressure. |
| (iii) | It is a weak solution and strong solvent. | It is a strong solution with a weak solvent. |
संबंधित प्रश्न
Differentiate between Turgor pressure and Wall pressure (explain)
Differentiate between the following pairs on the basis of what is indicated in the brackets.
Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them]
Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement a separating membrane, is called
Name the following:
The condition of a cell placed in a hypotonic solution.
Differentiate between the following:
Plasmolysis and deplasmolysis
Mention whether the following statement is true or false. Correct the false statement by altering the last word only.
The shrinkage of protoplasm, when a cell is kept in hypotonic solution.
Give reason for the following:
Potato cubes, when placed in water, become firm and increase in size.
Define the following:
Osmosis
Choose the correct answer:
Cell turgidity is caused by _______________
What do you mean by transpiration pull ?
Give Reasons for the following.
Salt and sugar are used in preserving food.
Differentiate between:
Osmosis and Diffusion
Differentiate between the following
Endosmosis and Exosmosis
Given below is the figure of an experimental set up to demonstrate root pressure.
(i) Define root pressure.
(ii) What change would you observe in the water level after some time?
(iii) What role is being played by the root pressure in the given experiment?
(iv) Why the oil has been sprinkled on water?
In an experiment, two sets of apparatus were set up as shown below:
In A there is a concentrated sugar solution inside the thistle funnel and red ink in the water outside the funnel. In B there is a concentrated glucose solution with red ink inside the thistle funnel and water outside the thistle funnel.
In both A and B the level of liquid inside the funnels rises up the tubes. In A the sugar solution turns red and in B, the water turns red.
Study the given observations and answer these questions:
- Name the process by which red ink moves in A and B.
- Which type of pressure forces the water molecules to move towards thistle funnels and cause a rise in the water level?
- Where does this process occur in plants and animals?
- What material could be used as a semi-permeable membrane?
The beaker is divided into two chambers A and B. The big circle represents solute and the small circles solvent.
(i) What can you say about the size of the holes in the membrane, if it is to behave semi- permeably between these two?
(ii) Will the solvent molecules pass through the membrane from left to right, from right to left, in either direction or in both directions?
(iii) In which direction will there be a net movement of solvent molecules?
Name the following:
The process by which raisins swell up when placed in a beaker of water.
Fill in the Blanks
Diffusion is the movement of molecules from a region of their ________ concentration to the region of their ________ concentration.
Multiple Choice Question:
In the process of osmosis in a cell:
