Why non polar is pass through
Nonpolar molecules are able to pass through cell membranes more easily than polar molecules because cell membranes are made up of a phospholipid bilayer. The phospholipids in the bilayer have hydrophilic (water-loving) heads and hydrophobic (water-fearing) tails.
Nonpolar molecules are hydrophobic in nature, meaning they are repelled by water. This makes them compatible with the hydrophobic tails of the phospholipids in the membrane. The nonpolar molecules can easily dissolve in the lipid tails and pass through the cell membrane.
On the other hand, polar molecules have hydrophilic properties and tend to be repelled by the hydrophobic interior of the lipid bilayer. They often require specific transport proteins or channels to pass through the membrane.
Overall, the nonpolar nature of certain molecules allows them to pass through cell membranes more easily compared to polar molecules, which have a harder time getting through the lipid bilayer.
Nonpolar substances are able to pass through nonpolar materials because of their similar intermolecular forces. Nonpolar substances are comprised of molecules with no significant dipole moments or electronegativity differences. This means that the electrons are shared equally between the atoms in the molecule, resulting in a symmetrical distribution of charge.
Nonpolar materials, such as nonpolar solvents or nonpolar membranes, do not have charged regions or polar interactions. As a result, they are not attracted to or repelled by polar or charged substances, making it easier for nonpolar substances to pass through them.
The principle involved is known as the "like dissolves like" rule. This rule states that substances with similar intermolecular forces tend to dissolve or pass through each other more easily. Nonpolar substances have weak London dispersion forces (also known as van der Waals forces) between their molecules, and nonpolar materials also exhibit similar forces. Therefore, nonpolar substances can pass through nonpolar materials much more readily than polar substances, which have stronger intermolecular attractions such as hydrogen bonding or dipole-dipole interactions.