Question

what is osmosis.....

Answer 1

hey mate ..

Here is your answer..

Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. 

Answer 2

Heya! !
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Osmosis is the movement of water (solvent) molecule from lower concentration to the place of their higher concentration through a semi permeable membrane.
It occurs in liquid medium only.
it is a special kind of DIFFUSION.