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प्रश्न
Fill in the Blanks
Diffusion is the movement of molecules from a region of their ________ concentration to the region of their ________ concentration.
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उत्तर
Diffusion is the movement of molecules from a region of their higher concentration to the region of their lower concentration.
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संबंधित प्रश्न
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
The most appropriate characteristic of a semipermeable membrane is that
(a) Mention whether the following statement is true (True) or false (False)
(b) Correct the false statement by altering the last word only.
A plant cell placed in hypotonic solution gets Plasmolysed.
The diagram given below represents an experimental set-up to demonstrate a certain process. Study the same and answer the questions that follow:
- Name the process.
- Define the above-named process.
- What would you observe in the experimental set-up after an hour or so?
- What control experiment can be set up for comparison?
- Keeping in mind the root hair, cell and its surroundings, name the parts that correspond to
- concentrated sugar solution
- parchment paper
- water in the beaker
- Name any other material that can be used instead of parchment paper in the above experiment.
- Mention two advantages of the process for the plants.
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypotonic salt solution
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
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?
Explain the Term: Endosmosis
Explain the Term: Exosmosis
