Which of the following statement is correct?
1
Isotonic solution is a solution where the osmotic pressure of external solution is more than that of the internal solution.
2
Mixing of gases in air happens because of the phenomenon known as osmosis in air.
3
Osmosis is the net movement of solvent molecules through a semi permeable membrane into a region of higher solute concentration and maintains a degree of difference in concentration on both the sides.
4
Osmosis is the net movement of solvent molecules through a semi permeable membrane into a region of higher solute concentration and maintains equal concentration on both the sides.