Question

Which of the following statements is false?

• A. Units of atmospheric pressure and osmotic pressure are the same.
• B. In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration.
• C. The value of molal depression constant depends on nature of solvent.
• D. Relative lowering of vapourpressure is a dimensionless quantity.

Answer 1

Answer: (B)

In reverse osmosis, solvent molecules move through a

semipermeable membrane from a region of lower

concentration of solute to a region of higher concentration.

Answer 2

If a pressure higher than the osmotic pressure is applied on the solution then reverse osmosis takes place i.e. the solvent will flow from the solution (i.e., high conc. Of solute) into the pure solvent (i.e. low concentration of solute) through the semi permeable membrane.