Question

Which among the following is involved in the process of diffusion?

• A. Movement of molecules from higher to lower concentration.
• B. Movement of molecules from lower to higher concentration.
• C. Movement of molecules with the expenditure of energy.
• D. Movement of molecules without the expenditure of energy.

Answer 1

Answer: (A), (D)

The correct options are
A Movement of molecules from higher to lower concentration.
D Movement of molecules without the expenditure of energy.

$\bullet$ Diffusion is the process of movement of molecules from a region of higher concentration to a region of lower concentration.
$\bullet$ It occurs without the expenditure of energy, and hence can be called as a passive process.