Question

Which of the following statements about diffusion is false?

a) Diffusion is the spontaneous movement a solute from a region of low to high concentration

b) Passive diffusion results in the net movement of molecules from high to low concentration

c) Diffusion is driven by a tendency of molecules to seek a state of increased disorder

d) Diffusion through membranes is decreased by the presence of cholesterol

Answer 1

Ans. a) Diffusion is the spontaneous movement a solute from a region of low to high concentration.

diffusion is the movement of molecules from a high concentration region to a low concentration region.

diffusion is hindered in the presence of cholestrol as it stiffens the plasma membrane the movement of molecules becomes restricted with increase in level of cholestrol. diffusion is operated by the kinetic energy of the molecules the more randomly they move the more diffusion takes place.

Answer 2

 What Diffusion Actually Is:

• Diffusion is the natural movement of molecules from an area of high concentration to low concentration (like sugar dissolving evenly in tea).

• Option a flips this—it’s backwards. That’s like saying "water flows uphill." Nope!

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1. Why the Other Options Are True:

• b) Correct: Passive diffusion does move molecules high → low (no energy needed).

• c) Correct: Diffusion increases disorder (entropy), which nature loves.

• d) Correct: Cholesterol stiffens membranes, slowing diffusion (think of it as "molecular traffic jam").

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Fun Analogy:
Diffusion is like people leaving a crowded room (high concentration) for empty space (low concentration). Option a claims they’d cram into the crowd—which only happens if you force them (like active transport, which requires energy).

Answer:
The false statement is a) Diffusion is the spontaneous movement of a solute from a region of low to high concentration.