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 vapour pressure, is a dimensionless quantity.
Answer :
In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration.
Solution :
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 conc. of solute ) through the semipermeable membrane.