Osmosis is the diffusion of solution of a weaker concentration, when both are separated by semi-permeable membrane. What is error in the statement?

The movement of solvent molecule is not specified.

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There is no mention of DPD.

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Behavior of semipermeable membrane is not specified.

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The exact concentration of solutions are not indicated.

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Solution

The correct option is A The movement of solvent molecule is not specified.
Osmosis is defined as the movement of solvent (water in living systems) molecules from a region of their high concentration (less concentrated solution) to a region of their lower concentration (more concentrated solution), across a semi-permeable membrane.

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Q. Question 6
Following are a few definitions of osmosis. Read carefully and select the correct definition:

(a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane
(b) Movement of solvent molecules from its higher concentration to lower concentration
(c) Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane
(d) Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membrane

Q. Which of the following statements is correct about diffusion and osmosis?
(i) In osmosis, a semipermeable membrane is used while diffusion is without membrane
(ii) In osmosis, movement of molecules occurs in one direction while in diffusion, movement occurs in all directions.
(iii) In osmosis, only the solvent moves while in diffusion both solute and solvent move

Osmosis is the flow of solvent into solution of higher concentration from solution of lower concentration through semi-permeable membrane. Which of the following is incorrect?

a. Osmotic pressure is the external pressure required to be applied so that there is no net movement of solvent across the membrane.

b. Reverse Osmosis is a process where you demineralize or deionize water by pushing it under pressure through a semi-permeable Reverse Osmosis Membrane.

c. In Osmosis when equilibrium is reached, then water stops flowing across the membrane

d. None of these

Assertion (A) When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
Reason (R) Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.

If osmosis is the movement of solvent only from higher concentration to lower concentration then how did the semi permeable membrane stop the flow of solvent from lower concentration to higher concentration?

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