The term used for diffusion of solvent through a semipermeable membrane is known as:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Osmosis
NCERT (2026-27 edition):
1.6.4 Osmosis and Osmotic Pressure – “… Assume that only solvent molecules can pass through these semipermeable membranes. If this membrane is placed between the solvent and solution as shown in Fig. 1.9, the solvent molecules will flow through the membrane from pure solvent to the solution. This process of flow of the solvent is called osmosis.”
Fig. 1.9: Level of solution rises in the thistle funnel due to osmosis of solvent