X is a type of diffusion that occurs through a semi permeable membrane. It also helps in opening and closing of stomata . Identify X and select the correct option
1. It occurs in both liquid and air medium .
2. It equalises concentration of solvent molecule in two mediums .
3.It is influenced by the presence of solute in the system .

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Solution

Facilitated diffusion
option (3)

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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.

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

Q. Which of the following match is incorrect?
(i) Diffusion - Movement of substances from higher concentration to lower concentration
(ii) Osmosis - Occurs in only one direction
(iii) Semi-permeable membrane - Prevents passage of solute molecules
(iv) Endosmosis - Withdrawal of water from the vacuole
(v) Plasmolysis - Shrinkage of protoplasm when kept in hypotonic solution

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

___ is the phenomenon of diffusion of solvent molecules across a semi-permeable membrane.

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Facilitated diffusion option (3)

Facilitated diffusion
option (3)