Question

Choose the correct answer from the alternatives given.
Which of the following in the best definition of diffusion?

• A. Movement of molecules from an area of their higher concentration to an area of their lower concentration
• B. Movement of water across a semi-permeable membrane from an area of high water concentration to an area of lower water concentration
• C. Movement of molecules from an area of their lower concentration to an area of their higher concentration
• D. Movement of water across a semipermeable membrane from an area of low water concentration to an area of higher Water concentration

Answer 1

Answer: (A)

Movement of molecules from an area of their higher concentration to an area of their lower concentration

Diffusion can be defined as the movement of molecules from an area of their higher concentration to an area of their lower concentration.

So, the correct answer is 'Movement of molecules from an area of their higher concentration to an area of their lower concentration'.