Question

What is the difference between permeable, selective pemeable, semi permeable and impermeable membrane ?

Answer 1

Permeable membrane- Membrane which permits the passage of molecules and ions through it by passive diffusion.
Selective/semi-permeable membrane- Membrane which permits the passage of certain molecules, ions through it by diffusion and restricts the others.
Impermeable membrane- Membrane which do not allow the passage of molecules and ions through it.