Osmotic pressure- Osmosis is the movement of solvent from a region of low solute concentration to a solution of higher solute concentration through a semi permeable membrane. Osmotic pressure is the minimum pressure that is applied to stop the flow of water through the semi-permeable membrane.
Turgidity- It is the state when the cell wall of plant cells are fully stretched due to high water content ant the cell are known to be turgid. The pressure exerted by the water onto the cell walls is known as turgor pressure.
Rigidity- Rigidity is stiffness or inflexibility and to resist any deformation by a solid body.
Fluidity- It is the property of fluids which enable a fluid to flow.
Density- Density of a substance is its mass per unit volume. It is characteristics property of a substance. It is usually the relation between the mass of substance and volume occupied by it.