English

Differentiate Between Diffusion and Osmosis (Definition)

Advertisements
Advertisements

Question

Differentiate between Diffusion and Osmosis (Definition)

Advertisements

Solution

Diffusion and Osmosis (Definition):

Diffusion Osmosis
Diffusion is the free movement of molecules of a substance from the region of its higher  concentration to the region of its lower concentration when the two substances are in direct contact. Osmosis is the diffusion of water
molecules across a semi-permeable membrane from a more dilute solution (with a lower solute concentration) to a
less dilute solution (with a  higher solute concentration).
shaalaa.com
  Is there an error in this question or solution?
2014-2015 (March) Science Paper 3

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Give reason for the following:

Potato cubes, when placed in water, become firm and increase in size.


Define the following:

Diffusion


What is the difference between diffusion and osmosis?

Distinguish between the following:

Plasmolysis and deplasmolysis


Name the following:

Condition of cell in which the cell contents are shrunken.


Explain why:

We gargle with saline solution in case of throat infection.


Explain why:

Bacteria and fungi do not grow in pickles, jams, jellies and squashes.


Choose the correct answer:

Osmosis involves diffusion of ___________


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:

  1. Name the process by which red ink moves in A and B.
  2. Which type of pressure forces the water molecules to move towards thistle funnels and cause a rise in the water level?
  3. Where does this process occur in plants and animals?
  4. What material could be used as a semi-permeable membrane?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×