Consider the following statements:

1. In osmosis process, the solvent moves from an area of low water potential to an area of high water potential

2. In reverse osmosis, external pressure is applied to reverse the flow of solvent

Which among the above is / are correct statements?

Answer: [B] Only 2

In the normal osmosis process, the solvent naturally moves from an area of low solute concentration (high water potential), through a membrane, to an area of high solute concentration (low water potential). The movement of a pure solvent is driven to reduce the free energy of the system by equalizing solute concentrations on each side of a membrane, generating osmotic pressure. Applying an external pressure to reverse the natural flow of pure solvent, thus, is reverse osmosis.

This question is a part of GKToday's Integrated IAS General Studies Module